Noun
macrogamete (plural macrogametes)
(cytology) The larger of a pair of conjugating gametes; often the female.
Synonym: megagamete
Antonym: microgamete
Some trophozoites enlarge and become macrogamete, whereas others divide repeatedly to form microgametes (anisogamy). Source: Internet
The fertilized macrogamete forms a zygote that in its turn forms an oocyst that is normally released from the body. Source: Internet