Coccus \Coc"cus\, n.; pl. Cocci. [NL., fr. Gr. ? grain, seed. See Cochineal.]

1. (Bot.) One of the separable carpels of a dry fruit.

2. (Zo["o]l.) A genus of hemipterous insects, including scale insects, and the cochineal insect (Coccus cacti).

3. (Biol.) A form of bacteria, shaped like a globule.

Source: Webster's Revised Unabridged Dictionary (1913)