12 letters · 25 points in Scrabble
noun (botany) a plant product that acts like a hormone
originEtymology tree Proto-Indo-European *bʰuH- Proto-Indo-European *-yéti Proto-Indo-European *bʰuHyéti Ancient Greek φύω (phúō) Ancient Greek φῠτόν (phŭtón)der. English phyto- Ancient Greek ὁρμῶν (hormôn)lbor. English hormone English phytohormone From phyto- + hormone.
Etymology from Wiktionary, CC BY-SA 3.0