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.

Source: Webster's Revised Unabridged Dictionary (1913)