noun. The vertebrate spine or spinal column.

noun. Something, such as the keel of a ship, that resembles a backbone.

noun. The main support or major sustaining factor.

noun. Strength of character; determination.

noun. undefined

noun. A ridge forming the principal axis of a mountain.

noun. The principal mountain ridge, range, or system of a region.

noun. The main chain of atoms in a polymer.

noun. A high-speed communications line that connects smaller, local networks to each other, especially in a wide area network.

noun. The bone of the middle line of the back; the spine; the vertebral column; the vertebræ collectively.

noun. Something resembling a backbone in appearance, position, or office: as, the Apennines are the backbone of Italy.

noun. Figuratively, firmness; stability of purpose; decision of character; resolution; moral principle.

noun. The column of bones in the back which sustains and gives firmness to the frame; the spine; the vertebral or spinal column.

noun. Anything like , or serving the purpose of, a backbone.

noun. Firmness; moral principle; steadfastness.

noun. through and through; thoroughly; entirely.

noun. The series of vertebrae, separated by disks, that encloses and protects the spinal cord, and runs down the middle of the back in vertebrate animals.

noun. any fundamental support, structure, or infrastructure

noun. courage, fortitude, or strength

noun. the part of a network that connects other networks together

noun. the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

noun. the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved

noun. fortitude and determination

noun. a central cohesive source of support and stability