tricyclic antidepressant - definition of tricyclic antidepressant by Medical dictionary
tri·cyc·lic an·ti·de·pres·sant a chemical group of antidepressant drugs that share a three-ringed nucleus. tri·cy·clic antidepressant (trī-sī′klĭk, -sĭk′lĭk) n. Any of a class of antidepressants, such as amitriptyline, that are structurally related to the...