corpus luteum

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corpus

 [kor´pus] (pl. cor´pora) (L.)
body.
corpus al´bicans white fibrous tissue that replaces the regressing corpus luteum in the human ovary in the latter half of pregnancy, or soon after ovulation when pregnancy does not supervene.
corpus amygdaloi´deum amygdaloid body.
cor´pora amyla´cea small hyaline masses of degenerate cells found in the prostate, neuroglia, and other sites.
corpus callo´sum an arched mass of white matter in the depths of the longitudinal fissure, made up of transverse fibers connecting the cerebral hemispheres.
corpus caverno´sum either of the two columns of erectile tissue forming the body of the penis or clitoris.
corpus fimbria´tum a band of white matter bordering the lateral edge of the lower cornu of the lateral ventricle of the brain.
corpus genicula´tum see geniculate bodies, lateral, and geniculate bodies, medial.
corpus hemorrha´gicum
1. an ovarian follicle containing blood.
2. a corpus luteum containing a blood clot.
3. a blood clot formed in the cavity left by rupture of a graafian follicle.
corpus lu´teum a yellow glandular mass in the ovary formed by an ovarian follicle that has matured and discharged its ovum; see also ovulation.
corpus mammilla´re mamillary body.
cor´pora quadrige´mina four rounded eminences on the posterior surface of the mesencephalon.
corpus spongio´sum pe´nis a column of erectile tissue forming the urethral surface of the penis, in which the urethra is found.
corpus ster´ni body of sternum.
corpus stria´tum a subcortical mass of gray matter and white matter in front of and lateral to the thalamus in each cerebral hemisphere.
corpus u´teri that part of the uterus above the isthmus and below the orifices of the fallopian tubes.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cor·pus lu·te·um

, corpus luteum spuriumcorpus luteum verum
the yellow endocrine body, at least 1-1.5 cm in diameter, formed in the ovary at the site of a ruptured ovarian follicle immediately after ovulation; there is an early stage of proliferation and vascularization before full maturity; later, there is a festooned, bright-yellowish lutein zone traversed by trabeculae of theca interna containing numerous blood vessels; the corpus luteum secretes estrogen, as the follicle did, and also secretes progesterone. If pregnancy does not occur, the body is called a corpus luteum spurium (corpus luteum of menstruation), which undergoes progressive retrogression to a corpus albicans. If pregnancy does occur, the body is called a corpus luteum verum (corpus luteum of pregnancy), which increases in size, persisting to the fifth or sixth month of pregnancy before retrogression.
Synonym(s): yellow body
Farlex Partner Medical Dictionary © Farlex 2012

corpus luteum

(lo͞o′tē-əm)
n. pl. corpora lutea (lo͞o′tē-ə)
A yellow, progesterone-secreting mass of cells that forms from an ovarian follicle after the release of a mature egg. Also called yellow body.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

corpus luteum

Reproductive medicine A yellow secretory structure that forms from the ovarian follicle after ovulation; if the egg is fertilized, the CL ↑ in size, produces progesterone, persists for several months as a CL of pregnancy, which prepares the endometerium for implantation of a fertilized egg; if an egg is not fertilized, the CL degenerates and shrinks–CL of menstruation. See Luteal phase defect.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

cor·pus lu·te·um

, corpus luteum spurium , corpus luteum verum (kōr'pŭs lū'tē-ŭm, spūrē-ŭm, verŭm) [TA]
The yellow endocrine body formed in the ovary at the site of a ruptured ovarian follicle; a stage of proliferation and vascularization precedes full maturity; later, a bright yellow lutein zone is traversed by trabeculae of the theca interna containing numerous blood vessels; the corpus luteum secretes estrogen, as does the follicle, and also secretes progesterone. If pregnancy does not occur, it is called a corpus luteum spurium, which undergoes progressive retrogression to become a corpus albicans. If pregnancy does occur, it is called a corpus luteum verum, which grows, persisting to the fifth or sixth month of pregnancy before retrogression.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

corpus luteum

A yellow mass of fatty material swelling out the empty GRAAFIAN FOLLICLE in the ovary after the egg (ovum) has been discharged. The cells of the corpus luteum secrete both oestrogens and progesterone and these hormones cause the lining of the womb to thicken and form a suitable bed for the fertilized ovum. If pregnancy does not occur the corpus luteum degenerates in less than two weeks.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

corpus luteum

(pl. corpora lutea) an endocrine organ formed in mammals in the ruptured GRAAFIAN FOLLICLE after the process of OVULATION. The corpus luteum is responsible for secreting PROGESTERONE under the influence of LH and LTH. If fertilization of the egg occurs the corpus luteum persists during pregnancy, otherwise it degenerates at the end of the OESTRUS CYCLE. It is formed by the action of luteinizing hormone produced by the anterior lobe of the PITUITARY GLAND. Progesterone prepares the reproductive organs for pregnancy and maintains the uterine lining.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Corpus luteum

A small, yellow structure that forms in the ovary after an egg has been released.
Mentioned in: Ovarian Cysts
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.