What is "carene"

Carene \Ca*rene"\, n. [LL. carena, corrupted fr. quarentena. See Quarantine.] (Ecol.) A fast of forty days on bread and water. [Obs.]

n. (context religion obsolete English) A fast of forty days on bread and water.

Carene, or delta-3-carene, is a bicyclic monoterpene which occurs naturally as a constituent of turpentine, with a content as high as 42% depending on the source. Carene has a sweet and pungent odor. It is not soluble in water, but miscible with fats and oils.