phel·lan·drene | \ -ˌdrēn \
Definition of phellandrene
: either of two isomeric aromatic oily liquid terpene hydrocarbons C10H16 occurring in many essential oils:
a : the terpene C3H7C6H6CH3 occurring in the dextrorotatory form especially in bitter fennel oil and ginger-grass oil and in the levorotatory form especially in eucalyptus oils (as from Eucalyptus phellandra); 1,5-para-menthadiene
— called also alpha-phellandrene
b : the terpene C3H7C6H7=CH2 occurring in the dextrorotatory form especially in water-fennel oil and in the levorotatory form especially in turpentine; 1(7),2-para-menthadiene
— called also beta-phellandrene
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