Pronunciation (UK) IPA (key): /ˈzaɪɡəʊt/ (US) IPA (key): /ˈzaɪɡoʊt/ Audio (UK)(file) Audio (US)(file) Noun Singular zygote Plural zygotes (countable) (biology) A zygote is a fertilized egg cell.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads