alk·​ox·​yl | \ alˈkäksə̇l \
plural -s

Definition of alkoxyl

: an univalent radical RO (such as methoxyl) composed of an alkyl group united with oxygen

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of alkoxyl

1891, in the meaning defined above

History and Etymology for alkoxyl

blend of alkyl and oxy-

Keep scrolling for more

Learn More about alkoxyl

Time Traveler for alkoxyl

Time Traveler

The first known use of alkoxyl was in 1891

See more words from the same year

Statistics for alkoxyl

Cite this Entry

“Alkoxyl.” The Dictionary, Merriam-Webster Inc., Accessed 15 December 2019.

Comments on alkoxyl

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


delight or enjoyment

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble tiles that read scrabble quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!