See Also:

yl (iou)



-yl suffix. Also -ule.
[Greek hule wood, material.]
Chemistry. Forming names of various groups and radicals, esp. those containing (a) any element combined with either oxygen or hydrogen, as carbonyl, chromyl, hydroxyl, sulphydryl; (b) carbon and hydrogen alone, as amyl, butyl, ethyl; (c) carbon and hydrogen with oxygen, as acetyl, carboxyl, lactyl.
b. Forming names of compounds containing such a group or radical, as alkyl, biphenyl.
Forming trade and proprietary names of various drugs, man-made fibres, etc., as Drinamyl, Rhovyl, Thermolactyl.