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jaw

 [jaw]
either the mandible (lower jaw) or the maxilla (upper jaw), two opposing bony structures of the mouth of a vertebrate; they bear the teeth and are used for seizing prey, for biting, or for masticating food. See anatomic Table of Bones in the Appendices.
cleft jaw a cleft between the median nasal and maxillary processes through the alveolus; see also cleft palate. Called also gnathoschisis.
Hapsburg jaw a mandible that is prognathous, often accompanied by Hapsburg lip. See illustration.
Hapsburg jaw with Hapsburg lip.
phossy jaw phosphonecrosis.

jaw

(jaw),
1. One of the two bony structures in which the teeth are set to form the framework of the mouth.
2. Common name for either the maxillae or the mandible.
[A.S. ceōwan, to chew]

jaw

(jô)
n.
a. Either of two bony or cartilaginous structures that in most vertebrates form the framework of the mouth and hold the teeth.
b. The mandible or maxilla or the part of the face covering these bones.
c. Any of various structures of invertebrates that have an analogous function to vertebrate jaws.

jaw′less adj.

jaw

(jaw)
1. One of the two bony structures, in which the teeth are set, forming the framework of the mouth.
2. Common name for either the maxilla or the mandible.
[A.S. ceōwan, to chew]

jaw

(jo)
Enlarge picture
JAW
1. Either or both of the maxillary and mandibular bones, bearing the teeth and forming the mouth framework. See: illustration
2. The grasping part of a surgical instrument. The word is usually used in the plural.

cleft jaw

An early embryonic malformation resulting in lack of fusion of the right and left mandible into a single bone.

crackling jaw

Noise in the normal or diseased temporomandibular joint during movement of the jaw. Synonym: crepitation

lumpy jaw

Actinomycosis.

jaw

1. The mandible, the U-shaped bone that articulates with the base of the skull high up in front of the ears. In biting and chewing (mastication) the mandible is pulled upwards by powerful muscles running down from the base and temples (temporal bones) of the skull.
2. The MAXILLA, or upper jaw.

jaw

the mandibles of any animal. The term is usually restricted to the bones surrounding the mouth of vertebrates, the (paired) upper jaws being referred to as the maxillae and the lower as the mandible. These bones carry the teeth where present, and are often used for crushing purposes.

jaw

(jaw)
1. One of the two bony structures in which teeth are set to form oral framework.
2. Common name for either maxillae or mandible.
[A.S. ceōwan, to chew]

Patient discussion about jaw

Q. after dinner my daughters jaw swelled up on one side and hurts her, so does her neck on that side. What does this mean? she is 9, no fever or any other ill effects, just the pain

A. weird. swelled up fast? does she have problem breathing? if so- it could be an allergic reaction. if she has problems breathing - GO NOW TO AN ER!!!
if it took a little bit - could be food that got stuck in her gums really hard causing an edema.
if it was slow (over night) could be an abscess in her tooth (a tooth decay that penetrated to the dental pulp).
any way i would go check it out.

More discussions about jaw
References in periodicals archive ?
According to Cat, the design also boosts productivity with patent-pending features, such as a new jaw locking system and the Speed Booster valve.
However, through the other two filters, Jaws comes up short of advocating for progressive social change.
Brownells calls their version a Multi-Vise (#080-000-019WB.) Mine has 3.5" jaws and can be set up vertical or 90 degrees right or left.
The jaws of humans--and dogs, salmon, lizards and all other bony vertebrates--contain three key bones: the maxilla and premaxilla of the upper jaw, and the dentary of the lower jaw.
But the study of the fossil of a fish that lived about 423 million years ago may dramatically improve our knowledge of the evolution of at least one important body part: the jaw.
But heavy bass can be safely lifted vertically by the jaw in a conventional lipping manner.
The Board affirmed a USPTO examiner's refusals to register the marks JAWS and JAWS DEVOUR YOUR HUNGER for a cooking show.
The jaws are 40 percent thinner than on conventional adjustable wrenches.
Until then, tetrapod jaws were still very fish-like, even though their owners had weight-bearing limbs and the ability to walk on land.
Class 2 malocclusion The lower jaw is too far back, the normal small overbite of the upper teeth is greatly increased and the molar bite is displaced backwards.
The tool set for the Forward Repair System (FRS), for example, has a bolt cutter with replaceable jaws. (The jaws can be ordered through the replacement portion of the PM-SKOT website under PN 0313HCX.) The Standard Automotive Tool Set (SATS) bolt cutters also have replaceable jaws that can be ordered with PN S0183.
On this basis, evaluates the use of different types of clamping jaws, suitable for the restrained parts.