Definitions

1. noun

a type of organic compound consisting of a hydrocarbon chain with at least one bond to a carbon atom that is not part of the chain, typically derived from a parent hydrocarbon by the replacement of one or more hydrogen atoms by an alkyl group.

“The new compound was an alkyl derivative of benzene.”

2. adjective

relating to or derived from an alkyl group or an alkyl radical.

“The alkyl chain in this molecule is a key component of its chemical properties.”