Plexus

n.; pl. L. Plexus, E. Plexuses [ L., a twining, braid, fr. plectere, plexum, to twine, braid. ] 1. (Anat.) A network of vessels, nerves, or fibers. [ 1913 Webster ]

2. (Math.) The system of equations required for the complete expression of the relations which exist between a set of quantities. Brande & C. [ 1913 Webster ]

3. A network; an intricate or interwoven combination of elements or parts in a coherent structure.

In the perception of a tree the reference to an object is circumscribed and directed by a plexus of visual and other presentations. G. F. Stout. [ Webster 1913 Suppl. ]