auxin
noun
aux·in
| \ ˈȯk-sən
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Definition of auxin
1
: any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (such as root initiation): such as
b
: any of various synthetic substances (such as 2,4-D) resembling indoleacetic acid in activity and used especially in research and agriculture
2
: plant hormone
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Other Words from auxin
auxinic
\ ȯk-ˈsi-nik
\
adjective
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adjective
Examples of auxin in a Sentence
Recent Examples on the Web
By studying natural variations in root structure and the genetics associated with these variations, the team homed in on a previously unknown biological pathway that regulates auxin, a plant hormone that helps control root growth. — San Diego Union-Tribune, "Salk Institute scientists get to the root of plant growth," 11 July 2019 Busch’s team identified a gene called EXOCYST70A3 that regulates auxin, without interfering with other pathways. — San Diego Union-Tribune, "Salk Institute scientists get to the root of plant growth," 11 July 2019 The current consensus is that the movements of the growth hormone auxin and the proteins that transport it throughout a plant are responsible for such patterns. — Maddie Burakoff, Smithsonian, "Decoding the Mathematical Secrets of Plants’ Stunning Leaf Patterns," 6 June 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'auxin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for auxin
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