quill

nouns

pen made from a bird's feather
quill, quill pen
a stiff hollow protective spine on a porcupine or hedgehog
quill
is a part of
small nocturnal Old World mammal covered with both hair and protective spines
Erinaceus europaeus, Erinaceus europeaeus, hedgehog
is a part of
relatively large rodents with sharp erectile bristles mingled with the fur
hedgehog, porcupine
is a type of (narrower)
a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
spine
any of the larger wing or tail feathers of a bird
flight feather, pinion, quill, quill feather
the hollow spine of a feather
calamus, quill, shaft