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sacral plexus

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noun
  1. a nerve network originating from the nerves of the sacral spine and innervating large areas of the lower trunk and legs, especially via the sciatic nerves.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

sacral plexus in Medicine

sacral plexus

n.
  1. A plexus formed by the fourth and fifth lumbar nerves and by the first, second, and third sacral nerves, lying on the posterior wall of the pelvis and supplying the lower limbs.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.