lycopodiaceous,a.Bot.|ˌlaɪkəpɒdɪˈeɪʃəs| [f.mod.L. Lycopodiāce-æ + -ous.] Pertaining to the family Lycopodiaceæ, of which lycopodium is the typical genus. 1852Th. Ross Humboldt's Trav. I. xiii. 428 Lycopodiaceous plants and mosses.1892Natural Sci. Mar. 57 A gigantic aquatic Lycopodiaceous plant.