- the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte.Compare megaspore,
- a pollen grain.
Origin of microspore
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for microspore
Microspore, the smaller kind of spore when there are two kinds, 161.The Elements of Botany
Germination of the microspore begins before it leaves the pollen-sac.
- the smaller of two types of spore produced by some spore-bearing plants, which develops into the male gametophyteCompare megaspore (def. 1)
- the pollen grain of seed plants
Word Origin and History for microspore
Online Etymology Dictionary, © 2010 Douglas Harper
- One of the two types of haploid spores produced by a heterosporous plant. Microspores develop into male gametophytes and are usually smaller than megaspores. In angiosperms, the microspore develops into the pollen grain.
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