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Definition of Phenol
Medically reviewed by Min Clinic Staff | Updated: January 2026
Phenol: 1. A poisonous corrosive compound obtained by the distillation of coal tar that, in dilute solution, is an antimicrobial agent. Also called carbolic acid. 2. A generic term for any compound similar in structure to phenol (an organic compound with one or more hydroxyl groups attached to an aromatic or carbon ring).