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pl. glomeruli [L. glomerulus, a ball]

1. One of the capillary networks that are part of the renal corpuscles in the nephrons of the kidney. Each is surrounded by a Bowman's capsule, the site of renal (glomerular) filtration, which is the first step in the formation of urine.
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2. A group of twisted capillaries or nerve fibers.

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