From the second edition (1989):
[ad. med.L. Danic-us, f. Dania Denmark.]
1613–8 Daniel Coll. Hist. Eng. 12 During this Danicq warre. 1692 Ray Dissol. World iii. v. (1732) 363 In the Baltick Danick and Holland shores.
Hence ˈDanicism, a Danish idiom or expression.
1881 F. York Powell in Encycl. Brit. XII. 628 The intercourse [of Iceland] with Denmark began to leave its mark in loan-words and Danicisms.