plant hormone
Americannoun
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Any of various hormones produced by plants that control or regulate germination, growth, metabolism, or other physiological activities. Auxins, cytokinins, gibberellins, and abscisic acid are examples of plant hormones.
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Also called phytohormone
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
It has long been known that auxin, a plant hormone, controls plant growth, root growth included.
From Science Daily • May 15, 2024
Environmental Protection Agency — is typically pumped into sealed storage rooms to inhibit the production of ethylene, a plant hormone.
From Seattle Times • Dec. 9, 2022
This calcium signaling in the cells causes polar transport of the plant hormone IAA to the bottom of the cell.
From Textbooks • Jun. 9, 2022
They treat each one with a series of plant hormone cocktails that trigger the growth of roots and shoots at different times, carefully controlling light, temperature and humidity all the while.
From Scientific American • Mar. 1, 2014
Dr. Link had found a plant hormone called heteroauxin, previously found elsewhere, in the nodules of red kidney beans.
From Time Magazine Archive
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
