Auxin

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    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. countable, uncountable

    "In Arabidopsis roots, cold stress may reduce shootward auxin transport and alter the intracellular auxin gradient."

  2. 2
    a plant hormone that promotes root formation and bud growth wordnet

Example

More examples

"In Arabidopsis roots, cold stress may reduce shootward auxin transport and alter the intracellular auxin gradient."

Etymology

From Ancient Greek αὐξάνω (auxánō, “to grow”) + -in.

Related phrases

plant hormone

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.