macrosporangium

2 definitions found

macrosporangium - Collaborative International Dictionary of English v.0.48 :

  Macrosporangium \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.
     [1913 Webster]

macrosporangium - WordNet (r) 2.1 (2005) :

  macrosporangium
      n 1: a plant structure that produces megaspores [syn:
           megasporangium, macrosporangium]