Wiktionary
thujene
n. (context organic compound English) Any of several isomeric bicyclic monoterpenes found in various herbs
Wikipedia
Thujene
Thujene (or α-thujene) is a natural organic compound classified as a monoterpene. It is found in the essential oils of a variety of plants, and contributes pungency to the flavor of some herbs such as Summer savory.
The term thujene usually refers to α-thujene. A less common chemically related double-bond isomer is known as β-thujene (or 2-thujene). Another double-bond isomer is known as sabinene.
Chemical structure comparison
alpha-thujene.png
α-Thujene