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The Collaborative International Dictionary
Valeryl

Valeryl \Val"er*yl\, n. [Valeric + -yl.] (Chem.) The hypothetical radical C5H9O, regarded as the essential nucleus of certain valeric acid derivatives.

Wiktionary
valeryl

n. (context organic chemistry especially in combination English) The univalent radical CH3(CH2)3CO- derived from valeric acid