#1 quill n. [quill pen] pen made from a bird's feather. wn
#2 quill n. a stiff hollow protective spine on a porcupine or hedgehog. wn
#3 quill n. [flight feather, pinion, quill feather] any of the larger wing or tail feathers of a bird. wn
#4 quill n. [calamus, shaft] the hollow spine of a feather. wn
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