Dictionary
plex•us
Pronunciation: (plek'sus), [key]—
n.,
—pl. -us•es, -us.
1. a network, as of nerves or blood vessels.
2. any complex structure containing an intricate network of parts:
the plexus of international relations.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.