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spermatozoon sper·mat·o·zo·on (spər-māt'ə-zō'ŏn', -ən, spûr'mə-tə-)
n. pl. sper·mat·o·zo·a (-zō'ə)
The mature male gamete or sex cell that consists of a cylindrical nucleated cell with a short neck and a thin motile tail, contains genetic information to be transmitted by the male, exhibits autokinesia, and is able to effect zygosis with an ovum; sperm.