1. The female gametophyte in seed plants, typically consisting of the embryo sac and its contents, which develops within the ovule.
Usage: botanical term; also called macrогametophyte in some contexts

Examples

• The megagametophyte develops inside the ovule after meiosis in the megasporocyte.
• In flowering plants, the megagametophyte typically contains eight nuclei arranged in a specific pattern.
• The egg cell within the megagametophyte is fertilized by one sperm nucleus during double fertilization.
• Understanding megagametophyte development is essential for studying plant reproduction in botany.
• The megagametophyte provides nutrients to the developing embryo after fertilization.