noun pyr·i·done \ˈpirəˌdōn\

Definition of pyridone



  1. :  any of several isomeric carbonyl compounds C5H5NO derived from pyridine: such as a :  the crystalline alpha isomer —called also 2-pyridone, 2(1H)-pyridone b :  the crystalline gamma isomer —called also 4-pyridone, 4(1H)-pyridone

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 pyridone

International Scientific Vocabulary pyrid- + -one

Seen and Heard

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


to cast off or become cast off

Get Word of the Day daily email!