Corundum (noun)

  1. A crystalline form of aluminum oxide that is a mineral and a valuable gemstone.
  2. A naturally occurring mineral that is a form of aluminum oxide and can be found in various colors including red (ruby), blue (sapphire), and colorless (white sapphire).


From the tamil word 'kurundam' meaning 'ruby'.


  1. The corundum was valued for its beauty and rarity.
  2. The corundum was used in jewelry and other decorative objects.
  3. The red corundum is known as a ruby.
  4. The blue corundum is known as a sapphire.
  5. The colorless corundum is known as a white sapphire.
Some random words: hemp, hatchway, one-piece