14 letters · 19 points in Scrabble
noun a qualitative change
noun (mathematics) a function that changes the position or direction of the axes of a coordinate system
noun a rule describing the conversion of one syntactic structure into another related syntactic structure
originInherited from Middle English transformacioun, from Middle French, from Ecclesiastical Latin trānsfōrmātiō. Morphologically transform + -ation.
Etymology from Wiktionary, CC BY-SA 3.0