noun oc·tyl \ˈäktəl\

Definition of octyl



  1. :  an alkyl radical C8H17 derived from an octane: such as a :  the normal radical CH3(CH2)6CH2 b :  the radical CH3(CH2)3CH(C2H5)CH2− having a branched chain; 2-ethyl-hexyl

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of octyl

International Scientific Vocabulary octane + -yl

Seen and Heard

What made you want to look up octyl? Please tell us where you read or heard it (including the quote, if possible).


to help become familiar with something

Get Word of the Day daily email!