11 letters · 16 points in Scrabble
noun a plant hormone isolated from a fungus; used in promoting plant growth
originEtymology tree English Gibberella Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English gibberellin From Gibberella + -in.
Etymology from Wiktionary, CC BY-SA 3.0