: a dwarf planet with a mean distance from the sun of 67 astronomical units (6.2 billion miles) and a diameter of 1500 miles (2400 kilometers)

Word History


Eris, ancient Greek goddess of strife

First Known Use

2006, in the meaning defined above

Time Traveler
The first known use of Eris was in 2006

Dictionary Entries Near Eris

Cite this Entry

“Eris.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Eris. Accessed 8 Dec. 2023.

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