n. The larger spore of a heterosporous plant, typically producing a female gametophyte
The Century Dictionary and Cyclopedia
n. Same as macrospore.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
Word Usage
"The behaviour of the chromosomes in meiosis or reduction division both in the pollen mother-cells and in the megaspore mother-cells which give rise to the so-called embryo-sac are fully described by Gates."