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The Collaborative International Dictionary
cinnamyl

Styryl \Sty"ryl\, n. [Styrax + -yl.] (Chem.) A hypothetical radical found in certain derivatives of styrolene and cinnamic acid; -- called also cinnyl, or cinnamyl.

Wiktionary
cinnamyl

n. (context organic chemistry especially in combination English) The univalent radical C6H5-CH=CH- characteristic of cinnamic compounds

Wikipedia

Usage examples of "cinnamyl".

There are also found in it cinnamyl acetate, cinnamic acid, phenylpropyl acetate and orthocumaric aldehyde, tannic acid and starch.