Synonym of balls, the male genitalia and courage, masculinity, &c.
Courage or assertiveness.
The stiffness of an arrow.
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.
The heartwood of trees.
A pointed, fairly rigid protuberance or needlelike structure on an animal, shell, or plant.
Something resembling a backbone, such as a ridge, or a long, central structure from which other structures radiate.
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.
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.