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 fertilizing gamete of a male organism, usually consisting of a round or cylindrical nucleated cell, a short neck, and a thin motile tail. Also called sperm cell, zoosperm. sper·mat'o·zo'al (-zō'əl), sper·mat'o·zo'an (-zō'ən), sper·mat'o·zo'ic (-zō'ĭk) adj. |