Main Entry: sper·ma·to·zo·on

Pronunciation: \-ˈzō-ˌän, -ˈzō-ən\

Function: noun

Inflected Form(s): plural sper·ma·to·zoa \-ˈzō-ə\

: a motile male gamete of an animal usually with rounded or elongate head and a long posterior flagellum

[spermatozoon illustration]