Microsporangium :: Microsporangium (n.) A sporangium or conceptacle containing only very minute spores. Cf. Macrosporangium.

Microspore :: Microspore (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..

Microsporic :: Microsporic (a.) Of or pertaining to microspores.

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