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A mineral consisting chiefly of uranium oxide with some lead, thorium, etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.

The process of forming an artificial palate.

Suture of the palate. See Staphyloraphy.

A general term for the uranium phosphates, autunite, or lime uranite, and torbernite, or copper uranite.

Of or pertaining to uranium; containing uranium.

An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel-white metal which is quite permanent. Its yellow oxide is used to impart to glass a delicate greenish-yellow tint which is accompanied by a strong fluorescence, and its black oxide is us…

To reënlist for service as a soldier. [U.S.] Gen. W. T. Sherman.

zation, and in composition a silicate of alumina and soda. It is a common constituent of granite and of various igneous rocks. See Feldspar.

s, having neither brain, skull, vertebræ, nor red blood. It forms the type of the group Acrania, Leptocardia, etc.

Having the mandibular arch articulated with the hyoid arch and the cranium, as in the cestraciont sharks; -- said of a skull.

A sandstone derived from the disintegration of granite or gneiss, and characterized by feldspar fragments. -- Ar*kos"ic (#), a.

Having the mandibular arch articulated directly to the cranium, as in the skulls of the Amphibia.

A lemon-yellow phosphate of uranium and calcium occurring in tabular crystals with basal cleavage, and in micalike scales. H., 2- 2.5. Sp. gr., 3.05-3.19.

or serving the purpose of, a backbone. The lofty mountains on the north side compose the granitic axis, or backbone of the country. Darwin. We have now come to the backbone of our subject. Earle.

basibranchials, the most ventral of the cartilages or bones of the branchial arches; basicranial, situated at the base of the cranium; basifacial, basitemporal, etc.

Of or pertaining to the bone in the base of the cranium, frequently forming a part of the occipital in the adult, but usually distinct in the young. -- n.

Of or pertaining to that part of the base of the cranium between the basioccipital and the presphenoid, which usually ossifies separately in the embryo or in the young, and becomes a part of the sphenoid in the adult.

Radiations first observed by the French physicist Henri Becquerel, in working with uranium and its compounds. They consist of a mixture of alpha, beta, and gamma rays.

A nearly cubical block of some tough stone, esp. granite, used as a material for street pavements. Its usual diameter is 5 to 7 inches.

Of or pertaining to the diameter of the cranium, from one parietal fossa to the other.