[¦te·trə¦byüd·əl ′tīt·ən‚āt] (organic chemistry) Ti(OC4H9)4 A combustible, colorless to yellowish liquid soluble in many solvents, boils at 312°C, decomposes in water; used in paints, surface coatings, and heat-resistant paints. Abbreviated TBT.AcronymsSeeTBT