What is "pinene"

n. (context organic compound English) Either of two isomeric bicyclic monoterpene hydrocarbons that are the principal components of pine resin

Pinene (CH) is a bicyclic monoterpene chemical compound. There are two structural isomers of pinene found in nature: α-pinene and β-pinene. As the name suggests, both forms are important constituents of pine resin; they are also found in the resins of many other conifers, as well as in non-coniferous plants such as camphorweed ( Heterotheca) and big sagebrush ( Artemisia tridentata). Both isomers are used by many insects in their chemical communication system. The two isomers of pinene constitute the major component of turpentine.