Macrospore

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Macrospore \Mac"ro*spore\, n. [Macro- + spore.] (Bot.)
     One of the specially large spores of certain flowerless
     plants, as {Selaginella}, etc.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  macrospore
       n : larger of the two types of spore produced in heterosporous
           plants; develops in ovule into a female gametophyte [syn:
            {megaspore}]