Meaning

noun a plant hormone that promotes root formation and bud growth

originEtymology tree Ancient Greek αὐξάνω (auxánō) Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip. English -in English auxin From Ancient Greek αὐξάνω (auxánō, “to grow”) + English -in.

Etymology from Wiktionary, CC BY-SA 3.0