Pronunciation: (spûr"mu-tu-zō'un, -on, spûr-mat"u-), [key]
—pl. -zo•aPronunciation: (-zō'u). [key] Cell Biol.
one of the minute, usually actively motile gametes in semen, which serve to fertilize the ovum; a mature male reproductive cell.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.