noun ami·cron \(ˈ)āˈmīˌkrän sometimes -mi- or -krən\

Definition of amicron



  1. :  one of the smallest particles detectable with the ultramicroscope (about 1×10−7 cm in diameter)

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 amicron

International Scientific Vocabulary 2a- + micron, originally formed as German amikron

First Known Use: circa 1906

Seen and Heard

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


capable of being understood in two ways

Get Word of the Day daily email!