1) Adapin 2) Amitriptyline 3) Clomipramine 4) Despiramine 5) Doxepin 6) Elavil 7) Imavate 8) Imipramine 9) Nortriptyline 10) Noxiptiline 11) Pamelor 12) Protriptyline 13) Sinequan 14) Surmontil 15) Tofranil 16) Trimipramine 1) Antidepressant 2) Antidepressant drug 3) Tricyclic antidepressant 4) Tricyclic antidepressant drug 
Tricyclics are chemical compounds that contain three interconnected rings of atoms. Many compounds have a tricyclic structure, but in pharmacology, the term has traditionally been reserved to describe heterocyclic drugs. Among these are antidepressants, antipsychotics, anticonvulsants, and antihistamines (as antiallergens, anti-motion sickness dru...
containing three fused rings or closed chains in the molecular structure.
<chemistry> Containing three fused rings or closed chains in the molecular structure. ... (19 Jan 1998) ... 
(tri-sik´lik) (-si´klik) containing three fused rings or closed chains in the molecular structure; see also antidepressant.
[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
tricyclic antidepressant noun 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