Microspore

[maikrәuspɒ:]

Definition

(noun.) smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte.

Edited by Carlos--From WordNet

Definition

(n.) One of the exceedingly minute spores found in certain flowerless plants, as Selaginella and Isoetes, which bear two kinds of spores, one very much smaller than the other. Cf. Macrospore.

Editor: Rosalie

Definition

n. (bot.) a small asexually produced spore: (zool.) one of the numerous very small spore-like elements produced through the encystment and subdivision of many monads.—n. Microsporan′gium.—adj. Mī′crosporous.

Editor: Rae