Definition of megagametogenesis in English:

megagametogenesis

Pronunciation /ˌmɛɡəɡəˌmiːtə(ʊ)ˈdʒɛnɪsɪs/ /ˌmɛɡəˌɡamɪtə(ʊ)ˈdʒɛnɪsɪs/

noun

Biology
  • The process of formation of megagametes.

Origin

1920s; earliest use found in Bulletin of the Torrey Botanical Club. From megagamete + -o- + -genesis, after gametogenesis.