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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 = Latin plect(ere) to plait, twine + -tus suffix of v. action Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for plexus
  • On one question, students must decide whether the trouble is with the cardiopulmonary plexus or the arch of the aorta.
  • If that got you in the solar plexus, you might want to sit down before you keep reading.
  • He is wearing a blue officer's coat and a shirt open to his solar plexus.
  • Sometimes, elderly fellows with their trousers up around their solar plexus still wander in by accident, looking for a tie.
  • The plexus on the vertebral artery is continued on to the basilar, posterior cerebral, and cerebellar arteries.
  • The communications which thus take place form what is called a plexus.
  • At the junction of the yolk-sac and body-stalk each vein is joined by a branch from the vascular plexus of the yolk-sac.
  • The superficial part of the cardiac plexus lies above its bifurcation, between it and the arch of the aorta.
  • The nerves are derived from the cardiac plexus, which are formed partly from the vagi, and partly from the sympathetic trunks.
  • The veins form a close cavernous plexus beneath the mucous membrane.
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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plexus in Technology

A modular World-Wide Web server written in Perl by Tony Sanders . Comes with interfaces to allow many other information services to be served via the Web.
Version 3.0m 1994-07-22 (
The Free On-line Dictionary of Computing, © Denis Howe 2010
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