noun an·isom·er·ism \ˌaˌnīˈsäməˌrizəm\

Definition of anisomerism



  1. :  the tendency of the primitive polyisomeres of an organism to become differentiated so that more highly evolved organisms do not consist of a linear series of similar and equivalent parts

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 anisomerism

an- + isomere + -ism

First Known Use: 1933

Seen and Heard

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


a brief usually trivial fact

Get Word of the Day daily email!