Sperm \Sperm\, n.[F. sperme, L. sperma, Gr. ???, ???, from ???? to sow. Cf. {Spore}.] (Physiol.) The male fecundating fluid; semen. See {Semen}. {Sperm cell} (Physiol.), one of the cells from which the spermatozoids are developed. {Sperm morula}. (Biol.) Same as {Spermosphere}.