luteinizing hormone

noun Biochemistry.

Origin:
1930–35

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World English Dictionary
luteinizing hormone (ˈluːtɪɪˌnaɪzɪŋ)
 
n
follicle-stimulating hormone See also prolactin LH, Also called: interstitial cell-stimulating hormone a gonadotrophic hormone secreted by the anterior lobe of the pituitary gland. In female vertebrates it stimulates ovulation, and in mammals it also induces the conversion of the ruptured follicle into the corpus luteum. In male vertebrates it promotes maturation of the interstitial cells of the testes and stimulates androgen secretion
 
[C19: from Latin lūteum egg yolk, from lūteus yellow]

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Medical Dictionary

luteinizing hormone lu·te·in·iz·ing hormone (lōō'tē-ə-nī'zĭng)
n.

Abbr. LH A hormone produced by the anterior lobe of the pituitary gland that stimulates ovulation and the development of the corpus luteum in the female and the production of testosterone by the interstitial cells of the testis in the male. Also called interstitial cell-stimulating hormone, lutropin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
luteinizing hormone   (l'tē-ə-nī'zĭng)  Pronunciation Key 
A glycoprotein hormone produced by the anterior portion of the pituitary gland. Luteinizing hormone stimulates ovulation and the development of the corpus luteum in female mammals and the production of testosterone in males.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

luteinizing hormone

one of two gonadotropic hormones (i.e., hormones concerned with the regulation of the gonads, or sex glands) that is produced by the pituitary gland. LH is a glycoprotein and operates in conjunction with follicle-stimulating hormone (FSH). Following the release of the egg (ovulation) in the female, LH promotes the transformation of the graafian follicle (a small egg-containing vesicle in the ovary) into the corpus luteum, an endocrine gland that secretes progesterone. In the male, LH stimulates the development of the interstitial cells of the testes, which secrete testosterone, a male sex hormone. The production of LH is cyclical in nature (especially in the female). See also follicle-stimulating hormone; menstruation.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Physical and emotional stress may block the release of luteinizing hormone, causing temporary amenorrhea.
The ovaries become less responsive to stimulation by follicle-stimulating hormone and luteinizing hormone.
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