(anatomy, zootomy) 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.

plural of spine

(not comparable) Having spines, spiny. / (comparable, in combination, usually figuratively) Having a certain type of spine (backbone).

Like or resembling a spine; spinal.

(idiomatic) Scary, exciting or exhilarating.

Inducing fear or nervousness; frequently used of a work of fiction.

(anatomy) The spinous process of a vertebra.

A small membranous protrusion from the dendrite of a neuron that typically receives input from a single axon at the synapse.

plural of dendritic spine

(historical) A nineteenth-century diagnosis for the post-traumatic symptoms of passengers involved in railroad accidents.