Is “Cubit” a Scrabble word?
Yes
CUBIT
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 Cubit
/ˈkjuː.bɪt/
noun
1.Various former units of length notionally based on the distance from a grown man's elbow to his fingertips, standardized in different places and times at values between 35 and 60 cm.
2.The ulna.
Synonyms: ulna, Russian cubit, arshin, dira, ell