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

corundum

play
noun co·run·dum \kə-ˈrən-dəm\

Definition of corundum

  1. :  a very hard mineral that consists of aluminum oxide occurring in massive and crystalline forms, that can be synthesized, and that is used for gemstones (as ruby and sapphire) and as an abrasive



Origin and Etymology of corundum

Tamil kuruntam; akin to Sanskrit kuruvinda ruby


First Known Use: 1804


Medical Dictionary

corundum

play
noun co·run·dum \kə-ˈrən-dəm\

Medical Definition of corundum

  1. :  a very hard mineral Al2O3 that consists of alumina occurring in massive form and as variously colored crystals which include the ruby and sapphire




Learn More about corundum

  1. Medical Dictionary: Definition of corundum Britannica.com: Encyclopedia article about corundum


Seen and Heard

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

WORD OF THE DAY

to destroy or remove completely

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

two-chairs-on-a-pier-by-the-ocean-in-summer

Which of the following words means “of or relating to summer”?

estival hiemal vernal brumal
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