indoleacetic acid

[in-dohl-uh-see-tik, -set-ik, in-]

noun Biochemistry.

a crystalline, water-insoluble powder, C10H9NO2, a natural plant hormone, used especially for stimulating growth and root formation in plant cutting.

Origin of indoleacetic acid

First recorded in 1885–90; indole + acetic Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for indoleacetic acid

indoleacetic acid


an auxin that causes elongation of the cells of plant stems. Formula: C 10 H 9 NO 2Abbreviation: IAA
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

indoleacetic acid in Medicine

indoleacetic acid



A plant hormone that stimulates growth.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.