noun in·dica·trix \¦ində̇¦kā‧triks, ə̇nˈdikə‧(ˌ)t-\

Definition of indicatrix



  1. :  an ellipsoid whose axes are proportional to the principal refractive indices of a crystal and from which various optical properties of the crystal may be deduced

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 indicatrix

New Latin, feminine of Late Latin indicator — more at -trix

Seen and Heard

What made you want to look up indicatrix? 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!