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tochord; -- applied especially to parts of the cartilaginous rudiments in the base of the skull.

The region of the skull, in the temporal fossa back of the orbit, where the great wing of the sphenoid, the temporal, the parietal, and the frontal hones approach each other.

Anat.), a bone which corresponds to the inner plate of the pterygoid process of the human skull, but which, in all vertebrates below mammals, is not connected with the posterior nares, but serves to connect the palatine bones with the point of suspension of the lower jaw. -- Pterygoid process (Anat.), a process projec…

to both." Harvey. Quadrate bone (Anat.), a bone between the base of the lower jaw and the skull in most vertebrates below the mammals. In reptiles and birds it articulates the lower jaw with the skull; in mammals it is represented by the malleus or incus.

A black flag with white skull and crossbones, formerly used by pirates; -- called also Jolly Roger.

e; rabdoidal; as, the sagittal furrow, or groove, on the inner surface of the roof of the skull.

A deformed condition of the skull, in which the vault is narrow, clongated, and more or less boat-shaped.

Fig.: The head; the skull; also, brains; sense; discretion. [Colloq.] To knock him about the sconce with a dirty shovel. Shak.

The skull. [Obs.]

rmous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case, filled with oil and spermaceti. This whale sometimes grows to the length of more than eighty feet. It is found in the warmer parts of all the oceans. Called also cachalot, and spermaceti wh…

Of or pertaining to both the sphenoidal and the ethmoidal regions of the skull, or the sphenethmoid bone; sphenethmoidal. Sphenethmoid bone (Anat.), a bone of the skull which surrounds the anterior end of the brain in many amphibia; the girdle bone.

oid bone (Anat.), an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several fetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosphenoid, Presphenoid.

in the higher vertebrates. They originate from the spinal cord and pass forward into the skull, from which they emerge in company with the pneumogastrics. -- Spinal column, the backbone, or connected series or vertebræ which forms the axis of the vertebrate skeleton; the spine; rachis; vertebral column. -- Spinal co…

sal and zygomatic bones; -- applied to a bone, or a center of ossification, in some fetal skulls. -- n.

The point on the side of the skull where the temporal line, or upper edge of the temporal fossa, crosses the coronal suture.

The depression in the face of a dog between the skull and the nasal bones. It is conspicuous in the bulldog, pug, and some other breeds.

bone. Supraoccipital bone (Anat.), a bone on the dorsal side of the great foramen of the skull, usually forming a part of the occipital in the adult, but distinct in the young.

es, or of cartilages representing them) which connects the base of the lower jaw with the skull in most vertebrates below mammals.

line of union, or seam, in an immovable articulation, like those between the bones of the skull; also, such an articulation itself; synarthrosis. See Harmonic suture, under Harmonic.

gill openings confluent beneath the neck. The pectoral arch is generally attached to the skull, and the entire margin of the upper jaw is formed by the premaxillary. Called also Symbranchia.