noun ran·kin·ite \ˈraŋkə̇ˌnīt\

Definition of rankinite



  1. :  a mineral Ca3Si2O7 consisting of a rare calcium silicate

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 rankinite

George A. Rankin †1963 American chemist + English -ite

Seen and Heard

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


feeling or affected by lethargy

Get Word of the Day daily email!