from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an eraser made of rubber (or of a synthetic material with properties similar to rubber); commonly mounted at one end of a pencil
Sorry, no etymologies found.
The particular feel of the pain, not like a pinprick or a knife cut, but both blunter and sharper, a pencil eraser pressed hard against the soft meat of the tongue like a cattle brand.