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1. (adj.) tricyclic
pertaining to or embodying three cycles.
2. tricyclic
having a three-ring chemical structure.
3. (n.) tricyclic
Also called tricyclic antidepressant. any of a group of pharmacologically active substances that share a common three-ring structure, used to treat depression and cocaine abuse.
Etymology: (1890–95)
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| Definition of 'tricyclic' |
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1. (noun) tricyclic, tricyclic antidepressant, tricyclic antidepressant drug
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
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Definitions of tricyclic 
