American Heritage® Dictionary of the English Language, Fourth Edition
- n. An organic acid radical: carbonyl.
Century Dictionary and Cyclopedia
- n. In chem., a suffix commonly used with radicals, denoting the fundamental part, the origin: as, methyl, CH3, is the fundamental radical of wood alcohol, CH3OH, methylic ether, (CH3)2O, methyl anime, CH3NH2, etc.
- n. organic chemistry A univalent radical or functional group formed from a given molecule. Thus "propyl" from propane, "benzyl" from benzene, and so forth.
GNU Webster's 1913
- (Chem.) A suffix used as a characteristic termination of chemical radicals; as in eth
yl, carbon yl, hydrox yl, etc.
- Back-formation from methyl, itself a back-formation from methylene (Wiktionary)
- French -yle, from Greek hūlē, wood, matter. (American Heritage® Dictionary of the English Language, Fourth Edition)
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