n. 1 vertebrae extending from the skull to the coccyx; backbone. 2 needlelike outgrowth of an animal or plant. 3 part of a book enclosing the pagefastening. 4 sharp ridge or projection. [Latin spinal
n. 1 vertebrae extending from the skull to the coccyx; backbone. 2 needlelike outgrowth of an animal or plant. 3 part of a book enclosing the pagefastening. 4 sharp ridge or projection. [Latin spinal