Share this entry

Share this page


Line breaks: zir|co¦nia
Pronunciation: /zəːˈkəʊnɪə

Definition of zirconia in English:


[mass noun]
Zirconium dioxide, a white solid used in ceramic glazes and refractory coatings, and as a synthetic substitute for diamonds in jewellery.
Example sentences
  • Cubic zirconia and moissanite are examples of common diamond simulants.
  • Compounds which are used for advanced ceramics include aluminum oxide and zirconia.
  • One concept proposed by researchers at the University of Washington uses zirconia crystals and electricity to convert carbon dioxide into carbon monoxide and oxygen, which can then be used as rocket propellant.


late 18th century: from zircon + -ia1.

Definition of zirconia in:

Share this entry

Share this page


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day colloquy
Pronunciation: ˈkɒləkwi
a conversation