spine

A series of bones situated at the back from the head to the pelvis of a human, or from the head to the tail of an animal, enclosing the spinal cord and providing support for the thorax and abdomen.

Courage or assertiveness.

Something resembling a backbone, such as a ridge, or a long, central structure from which other structures radiate.

The narrow, bound edge of a book that encloses the inner edges of the pages, facing outwards when the book is on a shelf and typically bearing the title and the author's and publisher's name.

A pointed, fairly rigid protuberance or needlelike structure on an animal, shell, mushroom or plant. The botanical term technically refers to such a structure derived from a leaf or part of a leaf.

The heartwood of trees.

Ellipsis of dendritic spine.

A linear payscale operated by some large organizations that allows flexibility for local and specific conditions.

A tall mass of viscous lava extruded from a volcano.

The stiffness of an arrow.