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collateral circulation

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noun
  1. circulation of blood through a network of minor vessels that become enlarged and joined with adjacent vessels when a major vein or artery is impaired, as by obstruction.
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Origin of collateral circulation

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

collateral circulation in Medicine

collateral circulation

n.
  1. Circulation maintained in small anastomosing vessels when the main artery is obstructed.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.