Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

anorthoclase

noun
an·​or·​tho·​clase | \əˈnȯrthəˌklās, -āz\
plural -s

Definition of anorthoclase 

: a feldspar of chiefly sodium potassium aluminum silicate that is closely related to orthoclase but triclinic

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!

First Known Use of anorthoclase

1888, in the meaning defined above

History and Etymology for anorthoclase

International Scientific Vocabulary an- + orthoclase; originally formed as German anorthoklase

Keep scrolling for more

Learn More about anorthoclase

Share anorthoclase

Statistics for anorthoclase

Look-up Popularity

Time Traveler for anorthoclase

The first known use of anorthoclase was in 1888

See more words from the same year

Comments on anorthoclase

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

Show Comments  Hide Comments 

WORD OF THE DAY

admonish

to express warning or disapproval

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

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