manubrium

A body part or process shaped like a handle, especially.

The broad upper division of the sternum with which the clavicle and first two ribs articulate.

The long tapering process of the malleus attached to the central portion of the eardrum.

In some technical uses, a handle or haft. Specifically

In anatomy and zoology: The presternum, or first piece of the sternum, of most mammals; the anterior, or in man the upper, segment of the sternum, corresponding to the first pair of ribs, and succeeded by a piece or pieces collectively called the gladiolus or mesosternum. See cut under sternum.

b) In birds, a small process, often forked, of the fore border of the sternum, in the middle line, at the root of the keel. See cut under epipleura.

The handle of the malleus; the process of the outer ear-bone, connected with the inner surface of the tympanic membrane. See cut under ossiculum.

In hydrozoans, the sac or polypite which projects from the center of the concavity of the nectocalyx of a medusa or the gonocalyx of a medusiform gonophore. See medusoid.

In botany, a cylindrical cell which arises from the center of the inner face of each of the eight shields that compose the wall of the antheridium in the Characeæ. Also called handle. Compare head, 6 , and head-cell.

In organ-building, a stop-knob or handle.