plant hormone

noun

: an organic substance other than a nutrient that in minute amounts modifies a plant physiological process
especially : one produced by a plant and active elsewhere than at the site of production

Examples of plant hormone in a Sentence

Recent Examples on the Web Coconut contains a type of anti-inflammatory plant hormone called cytokinins. Nick Blackmer, Verywell Health, 12 Apr. 2024 Other sustainable, lighter shipping cartons are being designed to remove ethylene, a plant hormone that encourages ripening. Containers from plants. Kim Severson, New York Times, 2 Apr. 2024 Ethylene is a natural plant hormone that triggers produce to ripen faster. Karla Walsh, Better Homes & Gardens, 3 Nov. 2023 Rooting hormone contains plant hormones called auxins that help the plant root faster. Maryal Miller Carter, USA TODAY, 22 June 2023 The cause for the strange blooms is plant hormones that are out of balance. Rita Perwich, San Diego Union-Tribune, 6 May 2023 Spuds and apples can give off high levels of ethylene gas (a natural plant hormone), triggering spouting. Rita Pelczar, Better Homes & Gardens, 20 Apr. 2023 Powdered Kelp Meal: Another all-natural powerhouse, this powder increases natural plant growth hormones such as auxins, cytokines, and gibberellins (aka: powerful plant hormones). Kristin Guy, Sunset Magazine, 28 Feb. 2023 Auxin is a plant hormone that is involved in regulating plant growth and the plant synthesizes it as needed. oregonlive, 18 Mar. 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'plant hormone.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1932, in the meaning defined above

Time Traveler
The first known use of plant hormone was in 1932

Dictionary Entries Near plant hormone

Cite this Entry

“Plant hormone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plant%20hormone. Accessed 20 May. 2024.

Kids Definition

plant hormone

noun
: a substance other than food that in small amounts changes one of the life processes of a plant
especially : one made by the plant itself and acting somewhere other than at the site where it is produced

Medical Definition

plant hormone

noun
: an organic substance other than a nutrient that in minute amounts modifies a plant physiological process
especially : one produced by a plant and active elsewhere than at the site of production

called also phytohormone

Last Updated: - Updated example sentences
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