Butter

n. [A.-S. buter, butor, buttor, butera, butere, Fries. butere, D. boter, Ger. butter, Lat. butyrum, Gr. βούτυρον, from βοῦς, ox, cow, and τυρός, cheese.]

1. An oily, unctuous substance obtained from cream or milk by churning.
2. Any substance resembling butter in degree of consistence, or other qualities, especially, in old chemistry, the chlorides, as butter of antimony, sesquichloride of antimony; butter of zinc, chloride of zinc; also, in organic chemistry, certain concrete fat oils remaining nearly solid at ordinary temperatures, as butter of cacao, &c.