1. 
[syn: sperm, sperm cell, spermatozoon, spermatozoan]
The Collaborative International Dictionary of English v.0.48:
Sperm \Sperm\, n.[F. sperme, L. sperma, Gr. ???, ???, from ????
   to sow. Cf. Spore.] (Physiol.)
   The male fecundating fluid; semen. See Semen.
   [1913 Webster]
   Sperm cell (Physiol.), one of the cells from which the
      spermatozoids are developed.
   Sperm morula. (Biol.) Same as Spermosphere.
      [1913 Webster]
WordNet (r) 3.0 (2006):
sperm cell
    n 1: the male reproductive cell; the male gamete; "a sperm is
         mostly a nucleus surrounded by little other cellular
         material" [syn: sperm, sperm cell, spermatozoon,
         spermatozoan]