Biochemistry. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues when transported to them by the body fluids.
Pharmacology. a synthetic substance used in medicine to act like such a compound when introduced into the body.
- hor·mo·nal, hor·mon·ic [hawr-mon-ik, -moh-nik], /hɔrˈmɒn ɪk, -ˈmoʊ nɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use hormone in a sentence
In addition to slowing you down and sapping your endurance, running too many miles on too little rest can lead to a host of problems ranging from hormone imbalances to shin splints to tendon strains.
Obesity is associated with alterations of certain hormone levels that we think might have a carcinogenic effect.How to Fix the Incentives in Cancer Research (Ep. 449) | Stephen J. Dubner | January 28, 2021 | Freakonomics
Uncertainty about what will happen next can trigger our body’s fight or flight response, spiking stress hormones like serotonin.
Serotonin is known as the “happy hormone,” as it regulates mood, body temperature and appetite.
What’s more, a 2007 study published in the journal Sleep shows that with each additional uninterrupted sleep cycle, you generate more of these hormones.
You have to acknowledge your age and position in life, for me quite a lot of those emotionally fueled songs were hormone songs.
He was prescribed a course of hormone pills that caused him to grow breasts and rendered him impotent.The Castration of Alan Turing, Britain’s Code-Breaking WWII Hero | Clive Irving | November 29, 2014 | THE DAILY BEAST
McAndrews agreed that the androgenic hormone pill would be problematic for those with a genetic propensity for ADA.Birth Control Made My Hair Fall Out, and I’m Not the Only One | Molly Oswaks | October 14, 2014 | THE DAILY BEAST
What if they were to measure body composition or hormone levels or metabolic rate?‘The Biggest Loser’ Could Be TV’s Most Important Show Ever | Daniela Drake | September 26, 2014 | THE DAILY BEAST
The HPA axis is a circuit between your brain, your hormone glands, and the rest of your body.
It is simply all the endocrine or hormone-producing organs organized into a balanced chemical system—adjusted to each other.Taboo and Genetics | Melvin Moses Knight, Iva Lowther Peters, and Phyllis Mary Blanchard
This is unquestionably to be interpreted as a case of hormone action.The Organism as a Whole | Jacques Loeb
Our modern conception of hormone action shows certain resemblances with this theory.On the Natural Faculties | Galen
Doubtless plants produce in their leaves a hormone which directs certain enzymes that conduct wound repair by cell division.Northern Nut Growers Association Report of the Proceedings at the Twenty-Fourth Annual Meeting | Northern Nut Growers Association
Yes, sir; he was given 300 milligrams of hydrocortisone which is an adrenal hormone.Warren Commission (3 of 26): Hearings Vol. III (of 15) | The President's Commission on the Assassination of President Kennedy
British Dictionary definitions for hormone
a chemical substance produced in an endocrine gland and transported in the blood to a certain tissue, on which it exerts a specific effect
an organic compound produced by a plant that is essential for growth
any synthetic substance having the same effects
- hormonal, adjective
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
Scientific definitions for hormone
A chemical substance secreted by an endocrine gland or group of endocrine cells that acts to control or regulate specific physiological processes, including growth, metabolism, and reproduction. Most hormones are secreted by endocrine cells in one part of the body and then transported by the blood to their target site of action in another part, though some hormones act only in the region in which they are secreted. Many of the principal hormones of vertebrates, such as growth hormone and thyrotropin, are secreted by the pituitary gland, which is in turn regulated by neurohormone secretions of the hypothalamus. Hormones also include the endorphins, androgens, and estrogens. See more at endocrine gland.
A substance that is synthesized by a plant part and acts to control or regulate the growth and development of the plant. The action and effectiveness of a hormone can depend on the hormone's chemical structure, its amount in relation to other hormones that have competing or opposing effects, and the ways in which it interacts with chemical receptors in various plant parts. Auxins, cytokinins, gibberellins, abscisic acid, and ethylene are plant hormones.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.