cobweb

A spiderweb, or the remains of one, especially an asymmetrical one that is woven with an irregular pattern of threads.

[…] there was stretched across his gateway a circular cobweb of the largest kind and quite entire. This looked so ominous that I actually turned aside and went in the back way.

A cobweb, night-spun, hung in an insidious circle from branch to branch, facing her. Early as it was, its first victim struggled in its gummy meshes.

One of its filaments; gossamer.

Something thin and unsubstantial, or flimsy and worthless; valueless remainder.

blow the cobwebs away

The dust and cobwebs of that uncivil age.

An intricate plot to catch the unwary.

Entangled in the cobwebs of the schools.

A web page that either has not been updated for a long time, or that is rarely visited.