megaspore 的定义
Botany.
- the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte.Compare microspore.
- the embryo sac of a flowering plant.
更多megaspore例句
- In Welwitschia also the megaspore is filled with prothallus-tissue, but single egg-cells take the place of archegonia.