-o·​yl | \ əwəl, ə(ˌ)wil, əˌwēl\
plural -s

Definition of -oyl

: acid radical used in the system of nomenclature adopted by the International Union of Pure and Applied Chemistry in names of radicals derived from acids whose names end in -oic decanoyl and also most other organic acids oleoylphthaloyl — compare -yl

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History and Etymology for -oyl

International Scientific Vocabulary -o- (as in -oic) + -yl

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incapable of being surmounted or overcome

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