thymol

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A white, crystalline, aromatic compound, C₁₀H₁₄O, derived from thyme oil and other oils or made synthetically and used as an antiseptic, a fungicide, and a preservative.

from The Century Dictionary.

• noun The phenol of cymene, C₁₀H₁₃.OH, a stearoptene obtained from oil of thyme by distillation.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A phenol derivative of cymene, C10H13.OH, isomeric with carvacrol, found in oil of thyme, and extracted as a white crystalline substance of a pleasant aromatic odor and strong antiseptic properties; -- called also hydroxy cymene.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun chemistry a monoterpene phenol, C10H13OH, found in the oil extracted from thyme; used as in perfume, as an antiseptic and fungicide, and in embalming

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a colorless crystalline solid used in perfume or preserving biological specimens or in embalming or medically as a fungicide or antiseptic