(n) :
a person or thing's backbone; the series of bones collectively from one's (literal or figurative) head to tail or pelvis; a rigid, pointed surface protuberance or needle-like structure on an animal, shell, or plant
(n) :
a person or thing's backbone; the series of bones collectively from one's (literal or figurative) head to tail or pelvis; a rigid, pointed surface protuberance or needle-like structure on an animal, shell, or plant