Plexus

Plexus: 1. In medicine, a network or tangle of lymphatic vessels, nerves, or veins. For example, the brachial plexus is a network of nerves leading to the arm.

2. In general, any interwoven entity made up of elements in a structure or system.

"Plexus" comes from the Latin "plectere" meaning "to braid." The word "plexus" achieved some literary currency as the title of a book by Henry Miller (1891-1980). "Sexus" (1949), "Plexus" (1953), and "Nexus" (1960) made up Miller's "Rosy Crucifixion Trilogy."