noun at·o·mic·i·ty \ˌatəˈmisətē, ˌatə-, -ətē, -i\

Definition of atomicity



  1. 1a :  valence b :  the number of atoms in the molecule of an element c :  the number of replaceable atoms or groups in the molecule of a compound

  2. 2 :  the state of consisting of atoms

  3. 3 philosophy :  the nature, character, or property of being atomic

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 atomicity

International Scientific Vocabulary atomic + -ity

Seen and Heard

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


a rounded knoll or a ridge of ice

Get Word of the Day daily email!