: 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
Etymology
Eris, ancient Greek goddess of strife
First Known Use
2006, in the meaning defined above
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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