microsplenia mi·cro·sple·ni·a (mī’krō-splē’nē-ə)
Abnormal smallness of the spleen.
[mahy-kroh-spaw-ran-jee-uh m, -spoh-] /ˌmaɪ kroʊ spɔˈræn dʒi əm, -spoʊ-/ noun, plural microsporangia [mahy-kroh-spaw-ran-jee-uh, -spoh-] /ˌmaɪ kroʊ spɔˈræn dʒi ə, -spoʊ-/ (Show IPA). Botany. 1. a containing microspores. /ˌmaɪkrəʊspɔːˈrændʒɪəm/ noun (pl) -gia (-dʒɪə) 1. the structure in certain spore-bearing plants in which the microspores are formed: corresponds to the pollen sac in seed plants Compare megasporangium […]
[mahy-kruh-spawr, ‐spohr] /ˈmaɪ krəˌspɔr, ‐ˌspoʊr/ noun, Botany. 1. the smaller of the two kinds of spores characteristically produced by seed plants and some fern allies, developing into a male gametophyte. Compare , 2. a pollen grain. /ˈmaɪkrəʊˌspɔː/ noun 1. the smaller of two types of spore produced by some spore-bearing plants, which develops into the […]
[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 (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).