First Known Use: 1933
Dictionary
auxin
noun aux·in \ˈȯk-sən\
Definition of AUXIN
1
: any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (as root initiation): as a : indoleacetic acid b : any of various synthetic substances (as 2,4-D) resembling indoleacetic acid in activity and used especially in research and agriculture
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Origin of AUXIN
International Scientific Vocabulary, from Greek auxein to increase — more at eke
Medical Dictionary
auxin
noun aux·in \ˈȯk-sən\
Medical Definition of AUXIN
: an organic substance that is able in low concentrations to promote elongation of plant shoots and usually to control other specific growth effects; broadly : plant hormone
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