Zool. any of the four haploid cells formed by the two consecutive meiotic divisions of a primary spermatocyte, each of which develops into a spermatozoon
Origin:
spermat(o)- + -id
See spermatid in American Heritage Dictionary 4
noun
Any of the four haploid cells formed by meiosis in a male organism that develop into spermatozoa without further division.