The Collaborative International Dictionary of English v.0.48:

Eugenol \Eu"ge*nol\, n. [Eugenia + -ol.] (Chem.)
   A colorless, aromatic, liquid hydrocarbon, C10H12O2
   resembling the phenols, and hence also called eugenic acid.
   It is found in the oils of pimento and cloves.
   [1913 Webster]