Definition of Hormone

1. Noun. The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect.

Definition of Hormone

1. n. A chemical substance formed in one organ and carried in the circulation to another organ on which it exerts a stimulating effect; thus, according to Starling, the gastric glands are stimulated by a hormone from the pyloric mucous membrane.

Definition of Hormone

1. Noun. (physiology) Any substance produced by one tissue and conveyed by the bloodstream to another to effect physiological activity. ¹

2. Noun. (pharmacology) A synthetic compound with the same activity. ¹

3. Noun. Any similar substance in plants. ¹

¹ Source:

Definition of Hormone

1. a secretion of the endocrine organs [n -S] : HORMONAL, HORMONIC [adj]

Medical Definition of Hormone

1. A naturally occuring substance secreted by specialised cells that affects the metabolism or behaviour of other cells possessing functional receptors for the hormone. Hormones may be hydrophilic, like insulin, in which case the receptors are on the cell surface or lipophilic, like the steroids, where the receptor can be intracellular. Some cancers may be stimulated and others inhibited by hormones (for example breast and prostate cancer). Some hormones can be synthesised and used as replacement in glandular deficiencies or as treatment for some cancers. Hormones may be injected, others taken by mouth. (29 Sep 1997)

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Lexicographical Neighbors of Hormone

hormonal gingivitis
hormonal therapy
hormone (current term)
hormone-replacement therapy
hormone antagonists

Literary usage of Hormone

Below you will find example usage of this term as found in modern and/or classical literature:

1. Proceedings of the Society for Experimental Biology and Medicine (1903)
"3 Effect of Parathyroid hormone upon Release of Degradative Enzymes from Rat Bone (40642)1 RL CRUESS, KC HONG, AND F. NAKAMURA ..."

2. Osteoporosis Research, Education and Health Promotion (1993)
"Generating and characterizing these mutant hormones will augment understanding of the structural basis of PTH function and allow definition of novel hormone ..."

3. Practical Organotherapy: The Internal Secretions in General Practice by Henry Robert Harrower (1922)
"EH Starling, of University Colleg-e, London, announced the discovery of what has been called "the original hormone." He named it secretin and established ..."

4. The Internal Secretory Organs: Their Physiology and Pathology by Artur Biedl (1913)
"If the secretory hormone were elaborated in the placenta, it would be active ... With the suppression of the assimilatory hormone supplied by the foetus, ..."

5. Reviews in Environmental Health (1998): Toxicological Defense Mechanics edited by Gary E. R. Hook, George W. Lucier (2000)
"Endocrine/hormone Disrupters hormones hormones are natural secretory products ... An environmental endocrine or hormone disruptor may be defined as ..."

6. Anabolic Steroid Abuse by Geraline C. Lin (1996)
"Mendelson, JH; Mello, NK; Teoh, SK; and Ellingboe, J. Alcohol effects on luteinizing hormone releasing hormone stimulated anterior pituitary and gonadal ..."

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