Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

epidiorite

noun
epi·​diorite | \ ¦epə̇, ¦epē+\
plural -s

Definition of epidiorite

: a variety of diorite formed by metamorphism from pyroxenic igneous rocks and often being somewhat schistose

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.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for epidiorite

International Scientific Vocabulary epi- + diorite; originally formed as German epidiorit

Keep scrolling for more

Learn More about epidiorite

Statistics for epidiorite

Look-up Popularity

Comments on epidiorite

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

Show Comments  Hide Comments 

WORD OF THE DAY

speculate

Listen to the pronounciation of speculate

to form ideas or theories about something

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play
Ask the Editors
Word Games