Cobweb micrometer

Cobweb Cob"web`, n. [Cob a spider + web.] 1. The network spread by a spider to catch its prey. [1913 Webster]

2. A snare of insidious meshes designed to catch the ignorant and unwary. [1913 Webster]

I can not but lament thy splendid wit Entangled in the cobwebs of the schools. --Cowper. [1913 Webster]

3. That which is thin and unsubstantial, or flimsy and worthless; rubbish. [1913 Webster]

The dust and cobwebs of that uncivil age. --Sir P. Sidney. [1913 Webster]

4. (Zo["o]l.) The European spotted flycatcher. [1913 Webster]

{Cobweb lawn}, a fine linen, mentioned in 1640 as being in pieces of fifteen yards. --Beck. Draper's Dict. [1913 Webster]

Such a proud piece of cobweb lawn. --Beau. & Fl.

{Cobweb micrometer}, a micrometer in which threads of cobweb are substituted for wires. [1913 Webster]