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Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences of the United States of America (1915–).
The 205th most frequently quoted source in the OED, with a total of 1937 quotations (about 0.06% of all OED quotations).

Total number of quotations1937Find quotations
Quotations providing first evidence of a word160Find quotations
Quotations providing first evidence of a particular meaning483Find quotations
LemmaDefinitionDate
acritarchAny hollow unicellular organic microfossil which is not otherwise categorized or classified.1963Go To Quotation
adenylylated= adenylated adj.1967Go To Quotation
adenylylating= adenylating adj.1967Go To Quotation
adenylylation= adenylation n.1967Go To Quotation
aerotolerantOf an anaerobic microorganism: not killed by oxygen; able to grow slowly in the presence of oxygen.1971Go To Quotation
alleleEach of two or more alternative forms of a gene that arise by mutation and which may be…1928Go To Quotation
allophenicOf an organism: produced by the fusion of two embryos; tetraparental.1967Go To Quotation
ArchaeaA taxon comprising the archaebacteria; (also archaea) organisms of this taxon…1990Go To Quotation
archaealOf, relating to, or involving the taxon Archaea or its members, the archaebacteria.1990Go To Quotation
archaebacteriumAny of a diverse group of micro-organisms similar to ordinary bacteria in size and…1977Go To Quotation
archaeonA member of the Archaea; an archaebacterium.1990Go To Quotation
AsnThe amino acid asparagine.1957Go To Quotation
AsxEither of the amino acids asparagine or aspartic acid, in contexts where they cannot be distinguished.1957Go To Quotation
azidothymidineA substituted derivative of thymidine that has been used to inhibit the replication of…1974Go To Quotation
base-pairedOrganized into or containing base pairs.1958Go To Quotation
base pairingThe combining of two bases to form a base pair; an instance of this.1956Go To Quotation
biogenicityThe state or property of being biogenic (biogenic adj. 1b).1968Go To Quotation
covalence= covalency n. a b.1919Go To Quotation
covalencyThe number of electrons in an atom that go to form a covalent bond; the number of covalent bonds that an atom can form.1919Go To Quotation
culturgenIn the terminology of C. J. Lumsden and E. O. Wilson: an element of behaviour or…1980Go To Quotation
cyanobacteriumAny of a division of prokaryotic micro-organisms that contain chlorophyll (green)…1973Go To Quotation
cybridA hybrid cell produced artificially by the fusion of two cells of which one lacks a…1974Go To Quotation
cyclooxygenaseAn enzyme involved in prostaglandin synthesis that introduces oxygen molecules…1974Go To Quotation
derepresstrans. To cause to be no longer repressed; to activate.1962Go To Quotation
dysmorphismMalformation or deformity, esp. as a congenital condition of the face or head.1965Go To Quotation
ecotypeA phenotype of a species which is the result of genetic or developmental adaptation to life…1916Go To Quotation
EdiacaranOf, relating to, or designating the Ediacara fauna (cf. Ediacara n.).1961Go To Quotation
electroporatetrans. To apply high-voltage pulses of electricity to (cells or protoplasts) in order…1985Go To Quotation
endorphinAny of a group of peptides that occur naturally in the brain and bind to the same receptors as does morphine.1976Go To Quotation
Franck–Condonattrib. Designating or relating to the principle that an electronic transition in an atom…1928Go To Quotation
glucosinolateAny of a class of toxic glucosides, produced by some brassicas, which yield mustard oils on ingestion.1961Go To Quotation
Hertzsprungattrib. Designating astronomical concepts and phenomena described by Hertzsprung or arising from his work.1948Go To Quotation
hyperfine(the presence of) multiplets of closely spaced lines in a spectrum that are closer…1927Go To Quotation
immunostimulatoryStimulating the function of the immune system or the production of an immune response.1968Go To Quotation
isozyme= isoenzyme n.1959Go To Quotation
Leecha set of points in 24-dimensional Euclidean space regularly arranged such that each point has exactly 196,560 nearest neighbours.1968Go To Quotation
macromutationistAn exponent or adherent of macromutationism.1975Go To Quotation
magaininAny of a group of peptides with antimicrobial properties that resemble those first…1987Go To Quotation
matricOf or relating to a matrix or matrices.1921Go To Quotation
melanovanaditeA triclinic hydrated oxide of calcium and vanadium occurring as aggregates of opaque black prismatic crystals.1921Go To Quotation
metamorphogenicBiol. Promoting or giving rise to metamorphosis. rare.1961Go To Quotation
met-enkephalinThe enkephalin that terminates in a methionine residue.1976Go To Quotation
methionylThe aminoacyl group derived from methionine, CH 3 S(CH 2) 2 CH(NH 2)CO—.1939Go To Quotation
methylase= methyltransferase n.1962Go To Quotation
microarchitectureChiefly Biol. Microscopic or small-scale structure (of a shell, tissue, organ, etc.).1954Go To Quotation
microburstA brief burst or spate (of transmission, etc.).1967Go To Quotation
microfilamentA very fine filament; (Cell Biol.) a type of actin filament, 4–7 nanometres in diameter…1963Go To Quotation
microvillousOf or relating to microvilli; having or consisting of microvilli.1965Go To Quotation
microwell= microtiter well n. at microtiter adj. Special uses.1972Go To Quotation
minerogenesisThe formation of minerals; = metallogeny n.1917Go To Quotation
minicellA small bacterial cell containing no nuclear material, produced during cell division in a particular strain of Escherichia coli.1967Go To Quotation
minigeneOriginally: any of the genes coding for segments of the variable regions…1978Go To Quotation
mirror symmetrySymmetry about a plane, as between an object and its reflection.1937Go To Quotation
misfoldintr. Of a protein or nucleic acid molecule: to fold into an incorrect tertiary structure. Also (occas.) trans. (in pass.).1971Go To Quotation
misfoldedOf a protein or nucleic acid molecule: that has undergone misfolding.1971Go To Quotation
misfoldingIncorrect folding in the formation of the tertiary structure of a protein or nucleic acid molecule; an instance of this.1971Go To Quotation
misincorporationThe incorporation into a protein, nucleic acid, or other biological polymer of a…1965Go To Quotation
misoriented= misorientated adj.1948Go To Quotation
mispairintr. Molecular Biol. To form a base pair with the wrong nucleotide. Usu. with with.1966Go To Quotation
mitochondriallyBy or through mitochondria; with respect to mitochondria.1965Go To Quotation
monogenicInvolving or controlled by a single gene.1921Go To Quotation
monomerizationThe splitting of a polymer or dimer into its constituent monomers.1963Go To Quotation
monomerizetrans. To break a dimer or polymer into its constituent monomers.1963Go To Quotation
monomethylatetrans. To convert into a monomethyl derivative; to introduce a methyl group into (a compound) as a substituent.1986Go To Quotation
monomicticOf a lake: having only one seasonal period of free circulation each year.1956Go To Quotation
monoploidHaving or designating a single set (containing the basic or haploid number)…1928Go To Quotation
Moseleyattrib. and in the genitive. Designating concepts and relationships arising from…1917Go To Quotation
muA temperate phage (family Myoviridae) which infects various enterobacteria, integrating…1963Go To Quotation
multi-channelled= multichannel adj. 1.1950Go To Quotation
multiforkInvolving or having more than one replication fork. Cf. multiforked adj.1964Go To Quotation
multifunctionalityThe condition of being multifunctional; diversity of function.1953Go To Quotation
multilayeringMultilayered character or appearance; the fact of being multilayered (lit. and fig.).1962Go To Quotation
multimericConsisting of or of the nature of a multimer.1964Go To Quotation
multipositiveHaving more than one positive charge. Also: positive in more than one test or assay. rare.1927Go To Quotation
mutagenizedThat has been treated with a mutagen.1963Go To Quotation
myelinatingThat is undergoing myelination. Also: that myelinates a nerve fibre.1953Go To Quotation
myoplasmicOf or relating to myoplasm.1960Go To Quotation
myristoylatedOf a molecule, esp. a protein: containing or bonded to a myristoyl group.1984Go To Quotation
myristoylationThe process of becoming myristoylated; the state of being myristoylated.1985Go To Quotation
nanomolarDesignating an amount, or a molar concentration, of the order of nanomoles.1968Go To Quotation
neperA unit of measurement used in comparing voltages, currents, power levels, or other…1922Go To Quotation
neurobiologicallyIn terms of neurobiology; from a neurobiological standpoint; with reference to neurobiology.1972Go To Quotation
neutronicOf or relating to a neutron or neutrons; consisting of neutrons. Also: spec. concerned…1933Go To Quotation
nifUsu. italicized. More fully nif gene. (A symbol for) a gene which encodes nitrogenase…1971Go To Quotation
nitrosatingThat causes nitrosation.1963Go To Quotation
non-allelicDesignating, relating to, involving, or caused by genes that are not allelic.1938Go To Quotation
non-covalentNot of the nature of or involving a covalent bond.1958Go To Quotation
non-covalentlyBy means of a non-covalent bond.1960Go To Quotation
non-isotopicConsisting of or containing nuclides of different elements; not sharing the same atomic number. Now rare.1923Go To Quotation
non-orientabilityThe property of being non-orientable.1938Go To Quotation
non-triviallyIn a non-trivial manner.1923Go To Quotation
oligomerizedThat has become oligomeric; that has been converted into an oligomer.1981Go To Quotation
oncogeneA gene whose products may in certain circumstances transform a cell containing them into a tumour cell.1969Go To Quotation
oncoproteinA protein encoded by an oncogene and able to cause the transformation of a cell into a tumour cell if introduced into it.1983Go To Quotation
opineAn amino acid whose molecule contains a guanido group.1977Go To Quotation
orotidineA ribonucleoside containing orotic acid, which is an intermediate in…1951Go To Quotation
orthonormalOf a set, esp. a basis for a vector space: such that any two elements are orthogonal and…1928Go To Quotation
orthotopicLocated in the correct (anatomical) position; spec. designating or relating to…1917Go To Quotation
osmiophilicHaving an affinity for or staining readily with osmic acid or osmium tetroxide.1923Go To Quotation
outgasTo drive off adsorbed or dissolved gas or vapour from (a substance or object), esp. by heating in a vacuum.1919Go To Quotation
overbiasingThe action of overbias v.1992Go To Quotation
p53(The name of) a multifunctional protein involved in transcription and regulation of the…1979Go To Quotation
passageableEsp. of tumour or tissue cells: capable of being subjected to passage (passage n. 10b).1973Go To Quotation
pathophysiologicallyAs regards pathophysiology.1974Go To Quotation
PatjitanianWith the. The early Palaeolithic culture or industry discovered near Patjitan, Java, in 1935.1938Go To Quotation
peptidylA radical formed from a peptide, esp. by the removal of an NH 2 group from an amide group. Usu. attrib.1964Go To Quotation
phenomeOriginally: the sum total of the constituents of a cell exclusive of its genetic material (rare…1949Go To Quotation
phenomicphenomic lag n. delayed appearance of phenotypic variants after induced…1949Go To Quotation
phonometricallyBy means of phonometry.1922Go To Quotation
phoronidAny of several tube-dwelling, worm-like marine invertebrates which constitute…1922Go To Quotation
photoaffinityattrib. Designating or relating to a technique of labelling large molecules (esp.…1970Go To Quotation
photocycleA chemical, physiological, or ecological cycle induced by changes in light levels; esp.…1953Go To Quotation
photoexcitedThat has been subjected to photoexcitation; having increased energy as a result of absorption of a photon.1918Go To Quotation
photolabileOf a substance: unstable in the presence of light. Opposed to photostable adj.1934Go To Quotation
photoreactivatingInvolved in or bringing about photoreactivation.1955Go To Quotation
photorecovery= photoreactivation n.1950Go To Quotation
phragmosomeA layer of darker cytoplasm which forms during mitosis in some plant cells at the site…1940Go To Quotation
planktivorousFeeding on plankton; characterized by such behaviour.1965Go To Quotation
plasmagelCytoplasm in the form of a gel, esp. surrounding the plasmasol in an amoeboid cell. Cf. plasmasol n.1923Go To Quotation
plasmalemmaA lipid bilayer surrounding the cytoplasm of a cell; a plasma membrane, a cell membrane; esp.…1923Go To Quotation
plasmasolCytoplasm in the form of a sol, such as forms the relatively fluid central regions of amoeboid cells. Cf. plasmagel n.1923Go To Quotation
polyadenylateA salt or ester, or the anion, of polyadenylic acid; the acid itself.1962Go To Quotation
polyclonallyBy means of or involving polyclonal cells.1976Go To Quotation
polydeoxy-Forming the names of polymers of deoxyribonucleotides, as polydeoxyadenylate; polydeoxyadenylic…1962Go To Quotation
polydeoxyribo-Forming the names of polymers of deoxyribonucleotides, as polydeoxyriboadenylate;…1961Go To Quotation
polymorphicallyIn a polymorphic way; with varying or multiple manifestations; = polymorphously adv.1954Go To Quotation
polyribo-Forming the names of polymers of ribonucleotides, as polyriboadenylate, polyriboadenylic…1958Go To Quotation
polysomyThe state or condition of being polysomic.1929Go To Quotation
polytenizeintr. To undergo polytenization.1973Go To Quotation
primaseAny of a group of polymerases that bring about the synthesis of DNA or RNA primers (see primer n. 3b).1977Go To Quotation
primosomeA complex of proteins, first identified in Eschericha coli, required for the initiation…1981Go To Quotation
propidiumA dye (more fully propidium iodide) which is a salt of a cation related to phenanthridine…1969Go To Quotation
protomericOf or relating to a protomer or protomers (protomer n.).1966Go To Quotation
proto-oncogeneOriginally: a normal cellular gene whose nucleotide sequence is similar to that of…1981Go To Quotation
protosolarOf or relating to the protosun; (also) relating to a preliminary stage in the formation of the solar system.1964Go To Quotation
prototrophA prototrophic microorganism (see prototrophic adj. 2).1946Go To Quotation
pseudodominanceOriginally: the apparent dominance of a recessive allele in a heterozygote resulting…1921Go To Quotation
psychoactiveOf a drug: that possesses the ability to affect the mind, emotions, or behaviour; = psychotropic adj.1959Go To Quotation
Q-spoiled= Q-switched adj.1964Go To Quotation
quantum jumpPhysics. An abrupt transition between one stationary state of a quantized system and…1924Go To Quotation
radiationlessNot involving the emission of electromagnetic radiation.1919Go To Quotation
radioassayAn assay performed by measuring the radioactivity of a radioisotope.1945Go To Quotation
Ramsauerthe sharp decrease, almost to zero, of the scattering cross-section of atoms of inert…1926Go To Quotation
recombinaseAny of various enzymes or enzyme systems involved in nucleic acid rearrangement, esp. in site-specific recombination.1964Go To Quotation
red giantA massive high-luminosity star that has cooled considerably at a late stage of its…1916Go To Quotation
ribosomalOf or relating to a ribosome or ribosomes.1959Go To Quotation
Richardson–Dushman equationThe Richardson equation, esp. in one or other of its later representations.1928Go To Quotation
Russell–SaundersRelating to or involving Russell–Saunders coupling.1926Go To Quotation
semi-lethalOf an allele or a chromosomal abnormality: causing impaired viability of most of the individuals homozygous for it.1917Go To Quotation
sialidase= neuraminidase n.1956Go To Quotation
sonicateA sample which has been subjected to ultrasound so as to fragment the macromolecules and membranes in it.1958Go To Quotation
sonomaite‘Hydrous sulphate of aluminum and magnesium, closely allied to pickeringite’ (Chester).1876Go To Quotation
thymopoietinA polypeptide hormone secreted by the thymus which stimulates the development of thymocytes.1974Go To Quotation
thymosinAn extract of the thymus gland which has a stimulating effect on the immune system (see quots.).1966Go To Quotation
transgenosisThe transfer of genes to an unrelated organism and their subsequent expression.1973Go To Quotation
triangulableOf a topological space: capable of undergoing triangulation (sense 2b).1940Go To Quotation
uninemeOf a chromatid: having (as usual) just one duplex of DNA.1963Go To Quotation
urkingdomOne of the highest taxonomic groups of organisms, proposed in some classifications, spec.…1977Go To Quotation
villinA protein found in the microvilli of the small intestine and involved in…1979Go To Quotation
vimentinA cellular protein found in a wide variety of cell types, usu. as a constituent…1978Go To Quotation

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