long bone

noun Anatomy. (in vertebrate animals)

any of the long, cylindrical, marrow-containing bones of the limbs: the long bone of the arm.

Origin of long bone

First recorded in 1855–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

long bone in Medicine

One of the elongated bones of the extremities, consisting of a tubular shaft, which is composed of compact bone surrounding a central marrow-filled cavity, and two expanded portions that usually serve as articulation points.