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[plek-suh s] /ˈplɛk səs/
noun, plural plexuses, plexus.
a network, as of nerves or blood vessels.
any complex structure containing an intricate network of parts:
the plexus of international relations.
Origin of plexus
1675-85; < New Latin: an interweaving, twining, equivalent to Latin plect(ere) to plait, twine + -tus suffix of v. action Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for plexus
Historical Examples
  • It attacks at once the heart, the intestines, and the plexus cliacus of the abdominal nerves.

  • What is a plexus of the sun, and how doth it blow on a bull?

    The Panchronicon Harold Steele Mackaye
  • And, finally, superficial descending branches of the plexus.

  • No a priori induction will ever extend this line or plexus to man.

    Life: Its True Genesis R. W. Wright
  • The external face is convex, covered by a plexus of veins, and slightly overhangs the pedal bone.

    Diseases of the Horse's Foot Harry Caulton Reeks
  • How, then, is the greater length of the plexus to be covered by a single "missing link?"

    Life: Its True Genesis R. W. Wright
  • From the plexus are derived the nerves of the pelvic limb (Sisson).

    Lameness of the Horse John Victor Lacroix
  • But the plexus of causes returneth in which I am intertwined,—it will again create me!

    Thus Spake Zarathustra Friedrich Nietzsche
  • This, Professor Bastian readily concedes, notwithstanding it cuts the Darwinian plexus squarely in the middle.

    Life: Its True Genesis R. W. Wright
  • There it stood, a plexus of energies, in the midst of darkness and sleep.

    The Clarion Samuel Hopkins Adams
British Dictionary definitions for plexus


noun (pl) -uses, -us
any complex network of nerves, blood vessels, or lymphatic vessels
an intricate network or arrangement
Word Origin
C17: New Latin, from Latin plectere to braid, plait
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for plexus

1680s, Modern Latin, literally "braid, network," noun use of past participle of Latin plectere "to twine, braid, fold" (see complex (adj.)); used of a network, such as solar plexus "network of nerves in the abdomen" (see solar). Related: Plexal.

Online Etymology Dictionary, © 2010 Douglas Harper
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plexus in Medicine

plexus plex·us (plěk'səs)
n. pl. plexus or plex·us·es

  1. A structure in the form of a network, especially of nerves, blood vessels, or lymphatics.

  2. A combination of interlaced parts; a network.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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