| nontricyclic | (n) a class of antidepressant drugs that are not tricyclic drugs and do not act by inhibiting MAO, Syn. nontricyclic antidepressant drug, nontricyclic antidepressant, nontricyclic drug |
| tricyclic | (n) an antidepressant drug that acts by blocking the reuptake of norepinephrine and serotonin and thus making more of those substances available to act on receptors in the brain, Syn. tricyclic antidepressant drug, tricyclic antidepressant |