- any of a class of growth hormones occurring in fungi and plants.
Origin of gibberellin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any of several plant hormones, including gibberellic acid, whose main action is to cause elongation of the stem: used in promoting the growth of plants, in the malting of barley, etc
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
- Any of numerous plant hormones, especially gibberellic acid, that promote stem elongation. The seeds, young shoots, and roots of plants contain gibberellins, and they are also found in fungi.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.