Tribromophenol \Tri*bro`mo*phe"nol\, Tribromphenol \Tri`brom*phe"nol\, n. (Chem.) A colorless crystalline substance ({C6H3OBr3}) prepared by the reaction of carbolic acid with bromine. The predominant isomer is 2,4,6-tribromophenol; -- called also {bromol}. [Webster 1913 Suppl. +PJC] Tribual