Is “Diapsid” a Scrabble word?
Yes
DIAPSID
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 Diapsid
/daɪˈæpsɪd/
noun
1.Any of very many reptiles, of the subclass Diapsida, that have a pair of openings in the skull behind each eye