noun: (medicine) Initialism of tricyclic antidepressant.
noun: (aviation) Initialism of terminal control area. [(aviation) a volume of controlled airspace set up at the confluence of airways in the vicinity of one or more major airports to protect traffic climbing out from and descending into the airports]
noun: (aviation, travel) Initialism of traffic conference area. [(aviation, travel) any of the three IATA world-wide subdivisions used by the airline industry.]
noun: (chemistry) Initialism of trichloroanisole. [A chlorinated derivative of anisole, responsible for cork taint in wines.]
noun: (chemistry) Initialism of tricarboxylic acid. [(organic chemistry) An organic carboxylic acid whose chemical structure contains three carboxyl functional groups, the best-known example being citric acid.]
