Open Dictionary
mouse here to listen, click to choose/add more
Location: USA
Source: Learn That Word
Profile URL:

Are you a native English speaker? How do you pronounce this word?

Thank you for contributing!
upload mp3 file or record now it's easy, promised!

{%type%} Definitions

WordNet 3.0Copyright Princeton University


Short "hint"

n. - Any of various forms of an oxide of a silvery ductile metallic element occurring naturally as corundum.

Usage examples (33)
  • This oxide, called alumina, does not melt until a heat of 5,000°
  • Aluminum is made from alumina, which is produced from bauxite ore.
  • Bauxite is refined first into alumina, which is then made into aluminum.
  • Chinalco and Alcoa are both buyers of alumina, which is used to make aluminum. for more
Tutoring comment

Tutoring comment not yet available...

add more
The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google,,, and YouTube,,,,, as well as the generous Creative Commons community.