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The Collaborative International Dictionary
Spermatozoa

Spermatozoon \Sper`ma*to*zo"["o]n\, n.; pl. Spermatozoa. [NL., fr. Gr. ???, sperm + zo^,on an animal.] (Biol.) Same as Spermatozoid.

Douglas Harper's Etymology Dictionary
spermatozoa

plural of spermatozoon, 1836.

Wiktionary
spermatozoa

n. (plural of spermatozoon English)

WordNet
spermatozoon
  1. n. the male reproductive cell; the male gamete; "a sperm is mostly a nucleus surrounded by little other cellular material" [syn: sperm, sperm cell, spermatozoan]

  2. [also: spermatozoa (pl)]

spermatozoa