MICROSPORE - Definition

Pronunciation:		'mIkru`spowr
WordNet Dictionary

	Definition:	[n] smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte

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	See Also:	spore

Webster's 1913 Dictionary

	Definition:	\Mi"cro*spore\, n. [Micro- + spore.] (Bot.) 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}.

Biology Dictionary

	Definition:	The smaller of the two kinds of spores produced in the sexual life cycle of a heterosporous plant, giving rise to the male gametophyte.