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plexus (n.)

1680s, Modern Latin, literally "braid, network," noun use of past participle of Latin plectere "to twine, braid, fold," from suffixed form of PIE root *plek- "to plait." Used of a network, such as solar plexus "network of nerves in the abdomen" (see solar). Related: Plexal.

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Definitions of plexus from WordNet

plexus (n.)
a network of intersecting blood vessels or intersecting nerves or intersecting lymph vessels;
Synonyms: rete
From wordnet.princeton.edu