phel·lan·drene | \-ˌdrēn\
plural -s

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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History and Etymology for phellandrene

New Latin phellandrium + International Scientific Vocabulary -ene

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