[ mahy-kruh-spawr, ‐spohr ]
/ ˈmaɪ krəˌspɔr, ‐ˌspoʊr /
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.
Related formsmi·cro·spor·ic [mahy-kruh-spawr-ik, ‐spor‐] /ˌmaɪ krəˈspɔr ɪk, ‐ˈspɒr‐/, mi·cro·spor·ous [mahy-kruh-spawr-uh s, ‐spohr‐, mahy-kros-per-uh s] /maɪ krəˈspɔr əs, ‐ˈspoʊr‐, maɪˈkrɒs pər əs/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for microspore
Germination of the microspore begins before it leaves the pollen-sac.
Microspore, the smaller kind of spore when there are two kinds, 161.The Elements of Botany|Asa Gray
British Dictionary definitions for microspore
/ (ˈmaɪkrəʊˌspɔː) /
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
Derived Formsmicrosporic or microsporous, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Science definitions for microspore
[ mīk′rə-spôr′ ]
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.