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n. Botany
A spore that gives rise to a male gametophyte and is smaller than a megaspore.

mi′cro·spo′ric, mi′cro·spo′rous (mī′krə-spôr′əs, mī-krŏs′pər-əs) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Botany) the smaller of two types of spore produced by some spore-bearing plants, which develops into the male gametophyte. Compare megaspore1
2. (Botany) the pollen grain of seed plants
ˌmicroˈsporic, ˌmicroˈsporous adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(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 (def. 1).
mi`cro•spor′ic (-ˈspɔr ɪk, -ˈspɒr-) mi`cro•spor′ous (-krəˈspɔr əs, -ˈspoʊr-, -ˈkrɒs pər əs) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microspore - smaller of the two types of spore produced in heterosporous plantsmicrospore - smaller of the two types of spore produced in heterosporous plants; develops in the pollen sac into a male gametophyte
spore - a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The significance of microspore division and division symmetry for vegetative cell-specific transcription and generative cell differentiation.
Effect of growth regulators on microspore embryogenesis in coconut anthers.
It reveals that the MCM has a high proportion of microspore volume and a low average pore diameter, and the average microspore volume is evaluated to be 0.0083 cc/g.
In this study, we compared effects of different genotypes and cold pretreatment applied to buds for pepper microspore embryogenesis efficiency during anther culture.
Low activation energy (below 42 kJ [mol.sup.-1]) implies diffusion controlled process because the temperature dependence of pore diffusivity is relatively weak and the diffusion process refers to the movement of the solute to an external surface and not diffusivity of material along microspore surfaces in a particle [65].
The surface area of the microspore on SGC (273 m 2 /g) was two-thirds than that of BET surface area of SGC (422 m 2 /g).
The young anther wall (see Figure 2E), when microspore mother cells are present, consists of a uniseriate epidermis, an endothecium formed by thin cell walls, one middle layer of cells similar to endothecium cells, and one layer of secretory tapetai cells.
[24] found out single species of fungi Pestalotiopsis microspore successfully degrade polyethylene.