Merriam-Webster Logo
SINCE 1828
dictionary
thesaurus
view recents

pentanone

noun
Save Word
pen·​ta·​none | \ ˈpentəˌnōn \
plural -s

Definition of pentanone

: either of two isomeric flammable liquid ketones derived from normal pentane:
a : the unsymmetrical compound CH3CH2CH2COCH3

— called also methyl propyl ketone, 2-pentanone
b : the symmetrical compound (C2H5)2CO obtainable from propionic acid

— called also diethyl ketone, 3-pentanone, propione

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!

History and Etymology for pentanone

pentane + -one

Keep scrolling for more

Learn More about pentanone

Statistics for pentanone

Cite this Entry

“Pentanone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pentanone. Accessed 18 Jan. 2021.

Comments on pentanone

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

Show Comments  Hide Comments 

WORD OF THE DAY

preeminent

Listen to the pronunciation of preeminent

See Definitions and Examples »

Test Your Vocabulary

Words of Snow and Ice Quiz

  • image1037863653
  • Which of the following refers to thin, bending ice, or to the act of running over such ice?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Typeshift

Anagram puzzles meet word search.

TAKE THE QUIZ
Love words? Need even more definitions?

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

Words at Play
Ask the Editors
Word Games