14 letters · 20 points in Scrabble
noun the act of producing offspring or multiplying by such production
noun a multiplicative increase
noun an arithmetic operation that is the inverse of division; the product of two numbers is computed
originBorrowed from Middle French, from Old French multiplicacion, from Latin multiplicatio, multiplicationem; ~equivalent to multiplicate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0