8 letters · 15 points in Scrabble
noun a substance (as a coenzyme) that must join with another to produce a given result
originEtymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-der. English co- English factor English cofactor From co- + factor.
Etymology from Wiktionary, CC BY-SA 3.0