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alkyl group

noun Chemistry.
  1. any of a series of univalent groups of the general formula CnH2n+1, derived from aliphatic hydrocarbons, as the methyl group, CH3−, or ethyl group, C2H5−.
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Also called alkyl radical.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018