-ˌjōn noun
( -s )
Etymology: International Scientific Vocabulary Thuj- (from New Latin Thuja ) + -one
: a fragrant oily ketone C 10 H 16 O derived from thujane, occurring in mixtures of dextrorotatory and levorotatory stereoisomeric forms in various essential oils (as thuja oil, wormwood oil, tansy oil), and used in making synthetic essential oils