Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary


noun ido·crase \ˈī-də-ˌkrās, ˈi-, -ˌkrāz\

Definition of idocrase

  1. :  a mineral that is a complex silicate especially of calcium, magnesium, iron, and aluminum

Origin and Etymology of idocrase

French, from Greek eidos form + krasis mixture, from kerannynai to mix — more at crater

First Known Use: 1804

Learn More about idocrase

Seen and Heard

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