from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Anatomy A small cluster or mass of blood vessels or nerve fibers.
  • n. Anatomy A tuft of capillaries situated within a Bowman's capsule at the end of a renal tubule in the vertebrate kidney that filters waste products from the blood and thus initiates urine formation.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A small intertwined group of capillaries within nephrons of the kidney that filter the blood to make urine
  • n. Any of several other similar intertwined masses of things

from the GNU version of the Collaborative International Dictionary of English

  • n. The bunch of looped capillary blood vessels in a Malpighian capsule of the kidney.

from The Century Dictionary and Cyclopedia

  • n. A small ball, as of yarn or something resembling it. Specifically In anatomy, a capillary plexus; a conglomeration, congeries, or rete of minute vessels or nerves, or both; in particular, the vascular glomerulus of the kidney (see below).
  • n. One of the powdery masses on the surface of some lichens.
  • n. Cooke's Manual.—

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a small intertwined group of capillaries in the malpighian body; it filters the blood during urine formation


New Latin, diminutive of Latin glomus, glomer-, ball.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • If you are speaking at the Society for Nephrology meeting, you probably don’t have to explain what a glomerulus is or convince them that its study is important for understanding kidney function.

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  • Enteropneusta called the glomerulus, a vascular complex placed on either side of the anterior portion of the stomochord, projecting into the proboscis-coelom.

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  • The glomerulus is a lobulated net-work of convoluted capillary bloodvessels, held together by scanty connective tissue.

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  • A glomerulus is a capillary tuft surrounded by Bowman's capsule in nephrons of the vertebrate kidney.

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  • Both lipid-soluble and polar substances will pass through the glomerulus into the tubule filtrate.

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  • Small toxicants (both polar and lipid-soluble) are filtered with ease by the glomerulus.

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  • The presence of albumin in the urine indicates that the glomerulus filtering system is damaged letting large molecules pass through.

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  • This results from the large amount of blood flow through the glomerulus, the relatively large pores (40 angstrom, an angstom is one one-hundred millionth of a centimeter) in the glomerular capillaries, and the hydrostatic pressure of the blood.

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  • Filtration, the first process, takes place in the glomerulus, the very vascular beginning of the nephron.

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  • The nephron has three primary regions that function in the renal excretion process, the glomerulus, proximal tubule, and the distal tubule.

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