a. and sb. Bot. [f. L. urtīc-a URTICA + -AL.]
1. adj. Typified by the genus Urtica of stinging-nettles; pertaining or belonging to the sting-nettles.
1846. Lindley, Veg. Kingd., 258. The plants of the Urtical Alliance. Ibid., 259. Urtical Exogens, with 2-lobed anthers splitting vertically.
2. sb. An exogenous plant belonging to the genus Urtica.
1846. Lindley, Veg. Kingd., 258. Natural Orders of Urticals. Ibid., 273. Euphorbials may be regarded then as a higher form of Urticals.
