Bot. [mod.L., f. anthēra + Gr. -ιδιον dimin. ending.] Oblong or globular ‘sperm’ cells found in Cryptogams, answering to the anthers of flowering plants.
1854. Balfour, Bot., 272. The antheridia were early noticed in the case of mosses.
1874. Cooke, Fungi, 169. An oblong cell, slightly curved,… an antheridium or organ of the male.
