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

plural of thymol

thymolsulphonephthalein

Alternative spelling of thymolsulphonephthalein

Thymol blue, a brownish-green or reddish-brown crystalline powder used as a pH indicator.

A pH indicator that can also be used to make invisible ink.

(medicine) Any drug that modifies a patient's mood, but especially an antidepressant medication

(medicine) That modifies a patient's mood

plural of thymoleptic

(pathology) A thymic lipoma