Dictionary![]() ![]() al•kyl•a•tionPronunciation: (al"ku-lā'shun), [key] —n. Chem. 1. the replacement of a hydrogen atom in an organic compound by an alkyl group. 2. the addition of a paraffin to an olefin, done in the manufacture of gasoline. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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