Is “Quiddity” a Scrabble word?
Yes
QUIDDITY
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 Quiddity
/ˈkwɪdɪti/
noun
1.The essence or inherent nature of a person or thing.
2.A trifle; a nicety or quibble.
3.An eccentricity; an odd feature.
Synonyms: nature, quintessence, whatness