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From The Collaborative International Dictionary of English v.0.44 [gcide]:
-yl \-yl\ [Gr. ? wood, material.] (Chem.) A suffix used as a characteristic termination of chemical radicals; as in ethyl, carbonyl, hydroxyl, etc.
Note: -yl was first used in 1832 by Liebig and W["o]hler in naming benzoyl, in the sense of stuff, or fundamental material, then in 1834 by Dumas and Peligot in naming methyl, in the sense of wood. After this -yl was generally used as in benzoyl, in the sense of stuff, characteristic ground, fundamental material.
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