noun azu·lene \ˈazhəˌlēn\

Definition of azulene



  1. 1a :  a liquid hydrocarbon C15H18 of intense blue color found in some essential oils (such as oil of cubebs) and in lignite tar b :  any of various blue to violet or green hydrocarbons closely related chemically to this hydrocarbon and occurring naturally in essential oils or formed from various colorless naturally occurring sesquiterpenes

  2. 2 :  a synthetic blue crystalline unsaturated bicyclic hydrocarbon C10H8 that resembles the isometric naphthalene in some properties but is more active chemically and that is the parent compound of the azulenes; cyclo-penta-cyclo-heptene

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Origin and Etymology of azulene

International Scientific Vocabulary azul- (from Spanish azul blue, from Old Spanish azur, azul) + -ene — more at azure

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capable of being understood in two ways

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