marcasite

noun
mar·​ca·​site | \ ˈmär-kə-ˌsīt , -ˌzīt; ˌmär-kə-ˈzēt\

Definition of marcasite

1a : crystallized pyrite
b : a pale yellow to white mineral of the same composition and appearance as pyrite but of different crystalline organization and lower specific gravity
2 : a piece of marcasite used in jewelry

First Known Use of marcasite

15th century, in the meaning defined at sense 1a

History and Etymology for marcasite

Middle English marchasite, from Medieval Latin marcasita

Keep scrolling for more

Learn More about marcasite

Dictionary Entries near marcasite

marc

Marcan

marcando

marcasite

marcatissimo

marcato

marcel

Statistics for marcasite

Look-up Popularity

Time Traveler for marcasite

The first known use of marcasite was in the 15th century

See more words from the same century

More from Merriam-Webster on marcasite

Britannica.com: Encyclopedia article about marcasite

Comments on marcasite

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

WORD OF THE DAY

marked by fawning attentiveness

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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!