tricyclic

2 ENTRIES FOUND:

tri·cy·clic

adjective \(ˌ)trī-ˈsī-klik, -ˈsi-klik\

Definition of TRICYCLIC

:  being a chemical with three usually fused rings in the molecular structure and especially a tricyclic antidepressant

Origin of TRICYCLIC

tri- + cyclic
First Known Use: 1891

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