AUXIN

auxin

(noun) a plant hormone that promotes root formation and bud growth

Source: WordNet® 3.1

Etymology

Noun

auxin (countable and uncountable, plural auxins)

(botany) A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.

Source: Wiktionary

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