[mahy-kruh-spawr, ‐spohr] /ˈmaɪ krəˌspɔr, ‐ˌspoʊr/

noun, Botany.
the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte.
Compare ,
a pollen grain.
the smaller of two types of spore produced by some spore-bearing plants, which develops into the male gametophyte Compare megaspore (sense 1)
the pollen grain of seed plants

1856, from micro- + spore.
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.


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  • Microsporocyte

    [mahy-kruh-spawr-uh-sahyt, -spohr-] /ˌmaɪ krəˈspɔr əˌsaɪt, -ˈspoʊr-/ noun, Botany. 1. one of the mother cells that produce four by meiosis. microsporocyte (mī’krə-spôr’ə-sīt’) A diploid cell that undergoes meiosis to produce microspores as part of microsporogenesis. Also called microspore mother cell, pollen mother cell.

  • Microsporogenesis

    microsporogenesis (mī’krə-spôr’ə-jěn’ĭ-sĭs) The formation of microspores inside the microsporangia (or pollen sacs) of seed plants. A diploid cell in the microsporangium, called a microsporocyte or a pollen mother cell, undergoes meiosis and gives rise to four haploid microspores. Each microspore then develops into a pollen grain (the microgametophyte).

  • Microsporophyll

    [mahy-kruh-spawr-uh-fil, -spohr-] /ˌmaɪ krəˈspɔr ə fɪl, -ˈspoʊr-/ noun, Botany. 1. a leaflike organ bearing microsporangia. /ˌmaɪkrəʊˈspɔːrəfɪl/ noun 1. a leaf on which the microspores are formed: corresponds to the stamen of a flowering plant Compare megasporophyll microsporophyll (mī’krə-spôr’ə-fĭl’) A leaflike structure that bears microsporangia, such as those of in the strobili of lycophytes or in […]

  • Microsporum

    Microsporum Mi·cros·po·rum (mī-krŏs’pər-əm, mī’krə-spôr’əm) n. A genus of pathogenic fungi that causes dermatophytosis in animals and humans.

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