11 letters · 21 points in Scrabble
noun a constant number that serves as a measure of some property or characteristic
originFrom French coefficient. Coined by French mathematician François Viète. Or influenced by (New) Latin coefficient-, which is the stem of coefficiens, which is a substantivation of the present active participle of coefficio, which comes from co- and efficio.
Etymology from Wiktionary, CC BY-SA 3.0