English dictionary
microspore
/'m/aI/kr/@/,sp/oU/r/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
Source: WordNet 3.0
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One of the exceedingly minute spores found in certain flowerless plants, as <i>Selaginella</i> and <i>Isoetes</i>, which bear two kinds of spores, one very much smaller than the other. Cf. <u>Macrospore</u>.
Source: webster1913