n. [ Gr. 'a`kros extreme, high + -gen. ] (Bot.) A plant of the highest class of cryptogams, including the ferns, etc. See Cryptogamia. [ 1913 Webster ]
The Age of Acrogens (Geol.), the age of coal plants, or the carboniferous era. [ 1913 Webster ]
adj. 1.1 pertaining to acrogens, flowerless plants (ferns or mosses) in which growth occurs only at the tip of the main stem. Syn. --acrogenous [ WordNet 1.5 ]