Noun | 1. | nontricyclic - a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO antidepressant, antidepressant drug - any of a class of drugs used to treat depression; often have undesirable side effects Desyrel, trazodone, trazodone hydrochloride - oral antidepressant (trade name Desyrel) that is a nontricyclic drug used as a sedative |