Qua·​oar ˈkwä(-ə)-ˌwär How to pronounce Quaoar (audio)
: a probable dwarf planet that orbits far beyond the orbit of Neptune with a mean distance from the sun of about 43.4 astronomical units (4.03 billion miles) and a diameter of approximately 890 miles (1430 kilometers)
Discovered by Brown and his colleagues in 2002, Quaoar took center stage at a session of the planetary science meeting in Puerto Rico.Ron Cowen, Science News, 16 Jan. 2010

Note: Quaoar is believed to qualify as a dwarf planet under the current definition of that term, but precise identification of its characteristics is made difficult by its distance from the Earth.

Word History

First Known Use

2002, in the meaning defined above

Time Traveler
The first known use of Quaoar was in 2002

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near Quaoar

Cite this Entry

“Quaoar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Quaoar. Accessed 22 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!