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Yes, PERIAPSIS is a Scrabble word!
Is it a valid word?
- Scrabble US: valid, 13 points.
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About PERIAPSIS
PERIAPSIS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).
Definitions
noun
- (astronomy) the point in an orbit closest to the body being orbited
Synonyms
Also: point of periapsis.