Cobweb
WordNet
noun
(1) A dense elaborate spider web that is more efficient than the orb web
(2) Filaments from a web that was spun by a spider
(3) A fabric so delicate and transparent as to resemble a web of a spider
WiktionaryText
Etymology
From the Middle English coppeweb. From coppe (spider), from attercoppe, from Old English āttercoppe, from ātor (poison) + copp (head); + web (web).