quill
     n 1: pen made from a bird's feather [syn: {quill pen}]
     2: a stiff hollow protective spine on a porcupine or hedgehog
     3: any of the larger wing or tail feathers of a bird [syn: {flight
        feather}, {pinion}, {quill feather}]
     4: the hollow shaft of a feather [syn: {calamus}, {shaft}]
Source: WordNet® 2.0