CORUNDUM

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does corundum mean? 

• CORUNDUM (noun)
  The noun CORUNDUM has 1 sense:

1. very hard mineral used as an abrasive

  Familiarity information: CORUNDUM used as a noun is very rare.

 Dictionary entry details 

• CORUNDUM (noun)

Sense 1

Meaning:

Very hard mineral used as an abrasive

Classified under:

Nouns denoting substances

Synonyms:

corundom; corundum

Hypernyms ("corundum" is a kind of...):

mineral (solid homogeneous inorganic substances occurring in nature having a definite chemical composition)

Hyponyms (each of the following is a kind of "corundum"):

alumina; aluminium oxide; aluminum oxide (any of various forms of aluminum oxide occurring naturally as corundum)

ruby (a transparent deep red variety of corundum; used as a gemstone and in lasers)

sapphire (a precious transparent stone of rich blue corundum valued as a gemstone)

Holonyms ("corundum" is a substance of...):

emery (a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper))

 Context examples 

The researchers also said they monitored likely “visually stunning” clouds that could be made of corundum, a mineral found in rubies and sapphires, as they moved around the planet.

(Exoplanet Could Have Clouds of Rubies, Sapphires, VOA)