cedrene

from The Century Dictionary.

• noun In chem., a volatile hydrocarbon (C₁₅ H₂₄) found in the oil of red cedar, Juniperus Virginiana.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A rich aromatic oil, C15H24, extracted from oil of red cedar, and regarded as a polymeric terpene; also any one of a class of similar substances, as the essential oils of cloves, cubebs, juniper, etc., of which cedrene proper is the type.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A rich aromatic oil, C15H24, extracted from oil of red cedar.
• noun organic chemistry Any of a class of similar substances, such as the essential oils of cloves, cubebs, juniper, etc.