quill

noun

1. writing implement made from the feather of a large bird
2. the hollow central part of a feather
3. a large, stiff feather from the wing or tail of a bird
4. one of the hollow, sharp parts on the back of a porcupine, hedgehog, or echidna
5. a float for a fishing line
6. a bobbin, spool, or spindle on which filling yarn is wound
7. a hollow shaft often surrounding another shaft and used in various mechanical devices
8. a roll of dried bark