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Sperm Whale :: Sperm whale () A very large toothed whale (Physeter macrocephalus), having a head of enormous 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 whale..

Thecodont :: Thecodont (a.) Having the teeth inserted in sockets in the alveoli of the jaws.

Carnivora :: Carnivora (n. pl.) An order of Mammallia including the lion, tiger, wolf bear, seal, etc. They are adapted by their structure to feed upon flesh, though some of them, as the bears, also eat vegetable food. The teeth are large and sharp, suitable for cutting flesh, and the jaws powerful..

Axle Guard :: Axle guard () The part of the framing of a railway car or truck, by which an axle box is held laterally, and in which it may move vertically; -- also called a jaw in the United States, and a housing in England..

Nippers :: Nippers (n. pl.) A device with fingers or jaws for seizing an object and holding or conveying it; as, in a printing press, a clasp for catching a sheet and conveying it to the form..

Cheek :: Cheek (n.) Those pieces of a machine, or of any timber, or stone work, which form corresponding sides, or which are similar and in pair; as, the cheeks (jaws) of a vise; the cheeks of a gun carriage, etc..

Vise :: Vise (n.) An instrument consisting of two jaws, closing by a screw, lever, cam, or the like, for holding work, as in filing..

Mentomeckelian :: Mentomeckelian (n.) The bone or cartilage forming the anterior extremity of the lower jaw in some adult animals and the young of others.

Jawing :: Jawing (p. pr. & vb. n.) of Ja.

Nematognathi :: Nematognathi (n. pl.) An order of fishes having barbels on the jaws. It includes the catfishes, or siluroids. See Siluroid..

Digastric :: Digastric (a.) Having two bellies; biventral; -- applied to muscles which are fleshy at each end and have a tendon in the middle, and esp. to the muscle which pulls down the lower jaw..

Stente :: Stenostome (a.) Having a small or narrow mouth; -- said of certain small ground snakes (Opoterodonta), which are unable to dilate their jaws..

Gymnodont :: Gymnodont (n.) One of a group of plectognath fishes (Gymnodontes), having the teeth and jaws consolidated into one or two bony plates, on each jaw, as the diodonts and tetradonts. See Bur fish, Globefish, Diodon..

Lamprey :: Lamprey (n.) An eel-like marsipobranch of the genus Petromyzon, and allied genera. The lampreys have a round, sucking mouth, without jaws, but set with numerous minute teeth, and one to three larger teeth on the palate (see Illust. of Cyclostomi). There are seven small branchial openings on each side..

Prognathous :: Prognathous (a.) Having the jaws projecting beyond the upper part of the face; -- opposed to orthognathous. See Gnathic index, under Gnathic..

Trismus :: Trismus (n.) The lockjaw.

Cyclostomi :: Cyclostomi (n. pl.) A glass of fishes having a suckerlike mouth, without jaws, as the lamprey; the Marsipobranchii..

Glanders :: Glanders (n.) A highly contagious and very destructive disease of horses, asses, mules, etc., characterized by a constant discharge of sticky matter from the nose, and an enlargement and induration of the glands beneath and within the lower jaw. It may transmitted to dogs, goats, sheep, and to human beings..

Coronoid :: Coronoid (a.) Resembling the beak of a crow; as, the coronoid process of the jaw, or of the ulna..

Mylohyoid :: Mylohyoid (a.) Pertaining to, or in the region of, the lower jaw and the hyoid apparatus; as, the mylohyoid nerve..

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