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anisogamete/an·iso·gam·ete/ (-gam´ēt) a gamete differing in size or structure from the one with which it unites.anisogamet´ic
Either of two conjugating gametes that differ in structure or behavior, such as the small motile male spermatozoon and the larger nonmotile female ovum. Also called heterogamete.
Etymology: Gk, anisos + gamos, marriage