| aecial | Of or relating to an aecium; characterized by the presence of aecia; productive of aeciospores. | 1905 | Go To Quotation |
| aeciospore | A dikaryotic spore of a rust fungus, which is produced in an aecium and in a… | 1905 | Go To Quotation |
| aecium | A fruiting body produced on the mycelium of a rust fungus at a particular stage in its… | 1905 | Go To Quotation |
| aerenchyma | Plant tissue containing large, air-filled intercellular spaces, found chiefly in the roots and stems of bog and aquatic plants. | 1889 | Go To Quotation |
| allotypic | Genetics. = meiotic adj. 1. Now disused. | 1905 | Go To Quotation |
| autotropism | Bot. The tendency of a plant part, esp. a root or shoot, to grow in a straight line or… | 1897 | Go To Quotation |
| biochore | In the terminology of Köppen and Raunkiaer: the boundary of a phytogeographical… | 1911 | Go To Quotation |
| biomolecule | Any of the molecules thought to be the fundamental living constituents of an organism; a living molecule. Now disused. | 1901 | Go To Quotation |
| biosynthesize | trans. To produce (a substance) by biosynthesis. | 1949 | Go To Quotation |
| blepharoplast | A centrosome-like protoplasmic body found in the sperm-cells of certain plants. | 1897 | Go To Quotation |
| dictyosporic | Of the nature of or characteristic of a dictyospore. Cf. muriform adj. 2. | 1904 | Go To Quotation |
| dysfunctional | Of or relating to dysfunction; that disrupts or impairs proper, normal, or satisfactory function; not operating normally. | 1936 | Go To Quotation |
| ecologism | Biol. The capacity for successful adaptation to changes in environmental conditions… | 1904 | Go To Quotation |
| ethnobotany | The traditional knowledge and customs of a people concerning plants; the scientific… | 1896 | Go To Quotation |
| geotactic | Of the nature of geotaxis; exhibiting or characterized by geotaxis. | 1893 | Go To Quotation |
| haplobiont | A haplobiontic plant or fungus. | 1927 | Go To Quotation |
| hydrarch | Of a succession of plant communities: having its origin in a watery habitat. | 1913 | Go To Quotation |
| krummholz | = elfin-wood n. at elfin n. 4. | 1908 | Go To Quotation |
| macroelement | A chemical element that is required as a nutrient in relatively large amounts; a… | 1942 | Go To Quotation |
| macrogametophyte | = megagametophyte n. | 1931 | Go To Quotation |
| macronutrient | Plant Physiol. Any of the chemical elements that are necessary in relatively large amounts for normal growth and development. | 1942 | Go To Quotation |
| megaphyllous | Having large leaves; having megaphylls. | 1901 | Go To Quotation |
| megasporogenesis | The process of formation of megaspores. | 1909 | Go To Quotation |
| megasporophyll | A sporophyll that bears megasporangia (e.g. the carpel of an angiosperm or ovuliferous scale of a gymnosperm). | 1900 | Go To Quotation |
| Mendelizing | Behaving in accordance with Mendelian principles. | 1909 | Go To Quotation |
| meristogenous | Involving the division of a hypha. Of a conidioma: formed by such division. | 1919 | Go To Quotation |
| mesocotylar | Of or belonging to the mesocotyl. | 1923 | Go To Quotation |
| Mesophytic | Originally: designating a division of geological time analogous to the Mesozoic era… | 1880 | Go To Quotation |
| microanatomical | Of or relating to microanatomy. | 1908 | Go To Quotation |
| micropropagation | The propagation of plants by tissue culture, using very small propagules such as free cells or shoot (meristem) tips. | 1971 | Go To Quotation |
| microsporangiate | Having or bearing only microsporangia. | 1896 | Go To Quotation |
| microtubule | A microscopic tubular structure; spec. any of the hollow tubules composed of… | 1962 | Go To Quotation |
| mitogenetic | Stimulating mitosis; (originally) spec. designating a type of ultraviolet radiation thought… | 1925 | Go To Quotation |
| mitogenic | Inducing or stimulating mitosis, mitogenetic; (later) (Immunol.)… | 1929 | Go To Quotation |
| multilayered | Composed of several or many layers. (lit. and fig.) | 1922 | Go To Quotation |
| mutation theory | A theory proposed by the Dutch biologist Hugo de Vries according to which new species… | 1902 | Go To Quotation |
| mycophile | An enthusiast for mushrooms and other (esp. edible) fungi; a person fond of eating… | 1885 | Go To Quotation |
| mycoplasmic | Biol. Of or relating to mycoplasma (mycoplasma n. 1). Now disused or hist. | 1902 | Go To Quotation |
| mycorrhiza | A plant root growing in close association with a fungus; a fungus growing on or in a… | 1886 | Go To Quotation |
| mycotrophy | A condition of association existing between the roots of certain plants and mycorrhizae… | 1900 | Go To Quotation |
| myxobacter | Originally (in form Myxobacter): a genus of slime-producing bacteria having rod-like… | 1892 | Go To Quotation |
| myxobacterium | Any member of the order Myxococcales (also called Myxobacterales), comprising… | 1898 | Go To Quotation |
| Myxococcus | A genus of myxobacteria having slender, tapering vegetative cells and spherical… | 1892 | Go To Quotation |
| nanophanerophyte | A shrub or subshrub between 25 cm and 2 metres (approx. 10 and 80 inches) in height… | 1907 | Go To Quotation |
| nasty | A nastic movement. | 1924 | Go To Quotation |
| nitrophilous | Of a plant, lichen, or fungus: growing best in soils or on substrates rich in nitrogen. | 1903 | Go To Quotation |
| Nitrosomonas | A genus of Gram-negative aerobic bacteria (family Nitrobacteraceae) whose members have… | 1896 | Go To Quotation |
| non-black | That is not black, esp. not coloured black. | 1905 | Go To Quotation |
| non-certified | Not certified in respect of some property or qualification; non-certificated. | 1916 | Go To Quotation |
| non-enzymic | = non-enzymatic adj. | 1919 | Go To Quotation |
| olericulture | The cultivation of edible plants, esp. leafy vegetables and herbs; the branch of horticulture dealing with this. | 1886 | Go To Quotation |
| oligomery | The state or condition of being oligomerous. | 1887 | Go To Quotation |
| oligotropic | Of an insect, esp. a bee: collecting nectar from the flowers of only a few… | 1899 | Go To Quotation |
| ombrophobic | = ombrophobous adj. | 1895 | Go To Quotation |
| ombrophoby | The property or state of being ombrophobous. | 1896 | Go To Quotation |
| ooplasm | Biol. The cytoplasm of an egg. Also: each of the regions of the cytoplasm of an egg… | 1896 | Go To Quotation |
| oosporic | Producing, consisting of, or characterized by oospores. | 1881 | Go To Quotation |
| orthoploid | Having a complete or balanced set of chromosomes; = euploid adj. | 1923 | Go To Quotation |
| ortstein | A hardpan; (now) spec. one cemented with iron and organic matter, usually in the B horizon of a podzol. | 1903 | Go To Quotation |
| over-and-over | Characterized by repetition; repetitious. rare. | 1888 | Go To Quotation |
| overgraze | trans. To cause damage to (grassland, etc.) by excessive grazing. Also intr.: to graze an area to excess. | 1901 | Go To Quotation |
| overwintered | That has survived or been kept alive through the winter. | 1911 | Go To Quotation |
| palaeobotanic | = palaeobotanical adj. | 1889 | Go To Quotation |
| palaeoecological | Of or relating to palaeoecology. | 1922 | Go To Quotation |
| pangene | Hugo de Vries' term for: a supposed particle embodying a heritable character which is present… | 1889 | Go To Quotation |
| pantropic | = pantropical adj. | 1911 | Go To Quotation |
| parasymbiont | An organism which grows on another in a parasymbiotic association; esp. a lichenicolous fungus. | 1911 | Go To Quotation |
| parasymbiotic | Of, relating to, or participating in parasymbiosis. | 1911 | Go To Quotation |
| parthenocarpic | Of, relating to, or produced by parthenocarpy; exhibiting parthenocarpy. | 1910 | Go To Quotation |
| parthenocarpically | By or as a result of parthenocarpy. | 1931 | Go To Quotation |
| patroclinous | Resembling the male parent more closely than the female; possessing or exhibiting a… | 1907 | Go To Quotation |
| pectiniferous | Containing pectin. | 1901 | Go To Quotation |
| peptized | That has been subjected to peptization. | 1916 | Go To Quotation |
| peptizing | That peptizes. | 1916 | Go To Quotation |
| pericycle | Originally: a layer of non-vascular tissue between the vascular cylinder and the… | 1890 | Go To Quotation |
| periplasmic | Mycol. Of, relating to, or situated in the periplasm of a fungus. | 1901 | Go To Quotation |
| Permo-Pennsylvanian | The late Pennsylvanian and early Permian systems or periods considered jointly. | 1919 | Go To Quotation |
| phanerophyte | A plant (typically a tree, shrub, or climbing plant) that bears its dormant buds on… | 1907 | Go To Quotation |
| phenolase | Any of a class of copper-containing enzymes, found esp. in plants and arthropods… | 1907 | Go To Quotation |
| phenotype | The sum total of the observable characteristics of an individual, regarded as the… | 1910 | Go To Quotation |
| photoconduction | Bot. The conduction of a phototropic stimulus from its point of perception in a plant to… | 1914 | Go To Quotation |
| photocontrol | Control by means of light. | 1954 | Go To Quotation |
| photoengrave | trans. To produce by the process of photoengraving. | 1885 | Go To Quotation |
| photoexcitation | Excitation caused by light; (Physics) excitation (excitation n. 5) caused by an incident photon. | 1914 | Go To Quotation |
| photoinduce | trans. To induce by the action of light; esp. (Plant Physiol.) to induce reproductive… | 1949 | Go To Quotation |
| photoinduction | The action or process of induction by light, esp. of reproductive behaviour in plants. | 1938 | Go To Quotation |
| photoinductive | Tending to induce flowering or other activity in plants by means of a regime of alternating periods of light and darkness. | 1940 | Go To Quotation |
| photoinhibition | Inhibition of a physiological process (and hence sometimes the growth of an organism)… | 1950 | Go To Quotation |
| photo-oxidative | Involving or characterized by photo-oxidation. | 1926 | Go To Quotation |
| photoreduce | trans. To reduce in size photographically. | 1894 | Go To Quotation |
| photoregulate | trans. To regulate (a biological or chemical process) by means of light. | 1957 | Go To Quotation |
| photoregulated | Of a process: regulated by means of light. | 1957 | Go To Quotation |
| photosensitized | Rendered sensitive to the action of light. | 1911 | Go To Quotation |
| photosyntax | = photosynthesis n. | 1893 | Go To Quotation |
| photosynthate | Material, or a substance, formed by photosynthesis. | 1906 | Go To Quotation |
| photosynthesis | The process (or series of processes) by which the energy of light absorbed by… | 1893 | Go To Quotation |
| photosynthesize | trans. To produce by photosynthesis. | 1908 | Go To Quotation |
| phototrophic | Of, relating to, or characterized by phototrophy. | 1921 | Go To Quotation |
| phragmoplast | A set of microtubules which forms during mitosis in some plant cells, appearing as… | 1904 | Go To Quotation |
| phycomycete | Any of a large and heterogeneous group of lower fungi comprising the (former) class… | 1889 | Go To Quotation |
| plasmodesmatal | Of, relating to, or of the nature of plasmodesmata. | 1947 | Go To Quotation |
| pleiomery | The condition of having more than the normal number of parts in a floral whorl or flower. | 1887 | Go To Quotation |
| pollen analyst | A palynologist; an expert in pollen analysis. | 1939 | Go To Quotation |
| pollinoid | A spermatium of a red alga. | 1881 | Go To Quotation |
| polygonboden | With pl. concord. Polygons (polygon n. 2b) of patterned ground. | 1902 | Go To Quotation |
| polyphyly | The polyphyletic development of a species or other taxon. | 1909 | Go To Quotation |
| polyploid | Of a cell or its nucleus: containing more than two homologous sets of chromosomes. Of… | 1911 | Go To Quotation |
| polystele | A stele in which vascular bundles are distributed throughout the parenchymatous tissue. | 1904 | Go To Quotation |
| polytopic | Biol. Of or relating to the independent origin of a species in a number of different places. | 1904 | Go To Quotation |
| porogam | A plant which displays porogamous fertilization. Cf. chalazogam n. at chalazogamic adj. Derivatives. | 1894 | Go To Quotation |
| porogamous | Designating fertilization in which the pollen tube enters the ovule by the micropyle… | 1896 | Go To Quotation |
| porogamy | Fertilization in which the pollen tube enters the ovule by the micropyle. Cf. chalazogamy n. at chalazogamic adj. Derivatives. | 1896 | Go To Quotation |
| postfertilization | Occurring, observed, or administered during the period immediately following fertilization of an ovum. | 1903 | Go To Quotation |
| prochromosome | A mass of densely staining chromosome material that occurs in certain interphase nuclei… | 1905 | Go To Quotation |
| profundal | Designating or relating to regions of the water and bed of a lake where light… | 1914 | Go To Quotation |
| progamous | = progamic adj. | 1885 | Go To Quotation |
| proterandry | = protandry n. Also: the emergence of male insects before the females. Cf. proterogyny n. | 1880 | Go To Quotation |
| proterogyny | = protogyny n. Cf. proterandry n. | 1879 | Go To Quotation |
| protoderm | A layer of meristematic cells which divide to give rise to the epidermis. Cf. procambium n., ground-tissue n. at ground n. 2a. | 1897 | Go To Quotation |
| protopectinase | A pectinase that converts protopectin to a soluble form by hydrolysis. | 1927 | Go To Quotation |
| psychrometrically | By means of a psychrometer. | 1936 | Go To Quotation |
| psychrotolerant | Of an organism, esp. a bacterium: capable of growing at temperatures close to freezing… | 1924 | Go To Quotation |
| pycnium | In rust fungi: a flask-shaped fruiting body producing haploid spores and receptive… | 1905 | Go To Quotation |
| research and development | Esp. in industry: work directed on a large scale towards the innovation… | 1892 | Go To Quotation |
| Rhodophyta | A division of algae comprising the red algae (see red alga n.); (with pl. concord) (also rhodophyta) algae of this division. | 1901 | Go To Quotation |
| rhoicissus | Any plant of the genus Rhoicissus (family Vitaceae), comprising South African climbing… | 1887 | Go To Quotation |
| saprobe | Any organism that derives its nourishment from decaying organic matter. | 1932 | Go To Quotation |
| self-compatible | Able to be fertilized by means of its own pollen. | 1922 | Go To Quotation |
| self-incompatible | Unable to be fertilized by means of its own pollen. | 1922 | Go To Quotation |
| sporozoic | = sporozoan adj. | 1892 | Go To Quotation |
| teleutosorus | A pustule consisting of a group of teliospores (teleutospores) and their supporting hyphæ. | 1905 | Go To Quotation |
| teliospore | A spore of the rust fungi (Uredinales) which produces a basidium on germination, often after overwintering; a teleutospore. | 1905 | Go To Quotation |
| telium | = teleutosorus n. | 1905 | Go To Quotation |
| uredinium | A cluster or sorus of uredospores and the hyphæ which bear them. | 1905 | Go To Quotation |
| uredosorus | = uredinium n. | 1905 | Go To Quotation |
| xerarch | Of a plant succession: having its origin in a dry habitat. | 1913 | Go To Quotation |
