Definition that contains heterosporous
- megaspore larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
- microspore smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
- macrospore larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte