Source : Webster's Revised Unabridged Dictionary (1913)

Semen \Se"men\, n.; pl. {Semina}. [L., from the root of serere,
   satum, to sow. See {Sow} to scatter seed.]
   1. (Bot.) The seed of plants.

   2. (Physiol.) The seed or fecundating fluid of male animals;
      sperm. It is a white or whitish viscid fluid secreted by
      the testes, characterized by the presence of spermatozoids
      to which it owes its generative power.

   {Semen contra}, or {Semen cin[ae] or cyn[ae]}, a strong
      aromatic, bitter drug, imported from Aleppo and Barbary,
      said to consist of the leaves, peduncles, and unexpanded
      flowers of various species of {Artemisia}; wormseed.