Is “Quadrature” a Scrabble word?
Yes
QUADRATURE
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 Quadrature
/-t͡ʃə(ɹ)/
noun
1.The process of making something square; squaring.
2.The act or process of constructing a square that has the same area as a given plane figure, or of computing that area.
3.(numerical analysis) The calculation of a definite integral by numerical means.