Is “Apsis” a Scrabble word?
Yes
APSIS
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Apsis
/ˈæpsɪs/
noun
1.A recess or projection, with a dome or vault, at the east end of a church; an apse.
2.Either of the points in the elliptical orbit of a planet or comet where it is closest or furthest from the sun; perihelion or aphelion; an apside