[meg-uh-spawr, -spohr] /ˈmɛg əˌspɔr, -ˌspoʊr/

noun, Botany.
the larger of the two kinds of characteristically produced by seed plants and a few fern allies, developing into a female gametophyte.
Compare .
the embryo sac of a flowering plant.
Also called macrospore. the larger of the two types of spore produced by some spore-bearing plants, which develops into the female gametophyte Compare microspore (sense 1)
the cell in flowering plants that gives rise to the embryo sac

1857, from mega- + spore.
One of the two types of haploid spores produced by a heterosporous plant. Megaspores develop into female gametophytes and are usually larger than microspores.


Read Also:

  • Megasporocyte

    noun, Botany. 1. a diploid cell in plants that undergoes meiosis to create four haploid megaspores. megasporocyte (měg’ə-spôr’ə-sīt’) A diploid cell that undergoes meiosis to produce megaspores as part of megasporogenesis. Also called megaspore mother cell.

  • Megasporogenesis

    [meg-uh-spawr-uh-jen-uh-sis, -spohr-] /ˌmɛg əˌspɔr əˈdʒɛn ə sɪs, -ˈspoʊr-/ noun, Botany. 1. the formation and development of megaspores. megasporogenesis (měg’ə-spôr’ə-jěn’ĭ-sĭs) The formation of megaspores inside the ovules of seed plants. A diploid cell in the ovule, called a megasporocyte or a megaspore mother cell, undergoes meiosis and gives rise to four haploid megaspores. In most plants, […]

  • Megasporophyll

    [meg-uh-spawr-uh-fil, -spohr-] /ˌmɛg əˈspɔr ə fɪl, -ˈspoʊr-/ noun, Botany. 1. a producing megasporangia only. /ˌmɛɡəˈspɔːrəfɪl/ noun 1. a leaf on which the megaspores are formed: corresponds to the carpel of a flowering plant Compare microsporophyll megasporophyll (měg’ə-spôr’ə-fĭl’) A leaflike structure that bears megasporangia.

  • Megastar

    /ˈmɛɡəˌstɑː/ noun 1. a very well-known personality in the entertainment business noun a very famous person, often an actor or actress

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