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1. (n.) microspore
the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte.
Etymology: (1855–60)
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| Definition of 'microspore' |
Princeton's WordNet |
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1. (noun) microspore
smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
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| Definition of 'microspore' |
Webster Dictionary |
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1. (noun) microspore
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
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Definitions of microspore 
