Is “Quadrella” a Scrabble word?
Yes
QUADRELLA
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 Quadrella
noun
1.A bet where the bettor must pick the winners of four nominated races at the same track.