Dictionary entry

Macrosporangium

Webster's Dictionary 1913

‖Mac′ro‐spo‐ran″gi‐um (?), n. [NL. See Macro-, and Sporangium.] (Bot.) A sporangium or conceptacle containing only large spores; — opposed to microsporangium. Both are found in the genera Selaginella, Isoctes, and Marsilia, plants remotely allied to ferns.