Definitions for "Microgametophyte"
It is the male gametophyte, the product of a microspore and a structure in which sperm form
Stage of the plant life cycle that develops from or within a microspore. The microgametophyte produces sperm in specialized structures known as antheridia.
The male gametophyte, formed by vegetative growth of the microspore of a heterosporous plant.
Keywords:  pollen, grains
Pollen grains.