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tetracaine - a crystalline compound used in the form of a hydrochloride as a local anesthetic local anaesthetic, local anesthetic, topical anaesthetic, topical anesthetic, local - anesthetic that numbs a particular area of the body
1. A single-ringed, crystalline organic base, C 4 H 4 N 2, that forms uracil, cytosine, or thymine and is the parent compound of many drugs, including the barbiturates. 2. Any of several organic compounds derived from or structurally related to pyrimidine, especially the nitrogen bases uracil, cytosine, and thymine.. a heterocyclic compound, C 4 H 4 N 2, that is the basis of several important biochemical substances. 2. one of several pyrimidine derivatives, esp. the bases cytosine, thymine, and uracil, which are fundamental constituents of nucleic acids.