[meg-uh-spawr-uh-jen-uh-sis, -spohr-] /ˌmɛg əˌspɔr əˈdʒɛn ə sɪs, -ˈspoʊr-/
the formation and development of megaspores.
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, only one of the megaspores then goes on to develop into a megagametophyte within the ovule, while the other three disintegrate. In the ovules of angiosperms, megasporogenesis takes place within a structure called a nucellus, and it is the megaspore farthest from the micropyle of the ovary that survives.
[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.
/ˈmɛɡəˌstɑː/ noun 1. a very well-known personality in the entertainment business noun a very famous person, often an actor or actress
[muh-gas, -gahs] /məˈgæs, -ˈgɑs/ noun 1. . /məˈɡæs/ noun 1. another name for bagasse (sense 2)
[meg-uh-struhk-cher] /ˈmɛg əˌstrʌk tʃər/ noun 1. a very large, usually high-rise building or a complex of such buildings used for many purposes, as for apartments, offices, stores, theaters, and athletic facilities. 2. a very large, complex organization.