Acantha
Part of speech: noun
Definition: A prickle. A spine or prickly fin. The vertebral column; the spinous process of a vertebra - Dunglison
Spine
Part of speech: noun
Definition: 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.Courage or assertiveness.The narrow, bound edge of a book.
Example sentence: I was born with Spina bifida. That's where you have a hole in your spine, and your nerve endings come out.