First Known Use: 1891
Dictionary
tricyclic
adjective tri·cy·clic \(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
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Origin of TRICYCLIC
tri- + cyclic
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