macrospore [
'mækrәspɒ:]
macrospore[ noun ]
larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
<noun.plant>
Macrospore \Mac"ro*spore\, n. [Macro- + spore.] (Bot.)
One of the specially large spores of certain flowerless
plants, as {Selaginella}, etc.