The Collaborative International Dictionary of English v.0.48:

Spermism \Sperm"ism\, n. [Gr. ? seed, sperm + -ism.] (Biol.)
   The theory, formerly held by many, that the sperm or
   spermatozoon contains the germ of the future embryo;
   animalculism.
   [Webster 1913 Suppl.]