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A crystalline, transparent, colorless substance found in the allantoic liquid of the fetal calf; -- formerly called allantoic acid and amniotic acid.

To diminish in strength; to abate; to subside. "When the rage allays." Shak.

[From the Allegheny River, Pennsylvania.] (Geol.) Pertaining to or designating a subdivision of the Pennsylvanian coal measure.

The tie or obligation, implied or expressed, which a subject owes to his sovereign or government; the duty of fidelity to one's king, government, or state.

A figurative sentence or discourse, in which the principal subject is described by another subject resembling it in its properties and circumstances. The real subject is thus kept out of view, and we are left to collect the intentions of the writer or speaker by the resemblance of the secondary to the primary subject.…

absolute property of the owner; real estate held in absolute independence, without being subject to any rent, service, or acknowledgment to a superior. It is thus opposed to feud. Blackstone. Bouvier.

Any one of two or more distinct crystalline forms of the same substance; or the substance having such forms; -- as, carbonate of lime occurs in the allomorphs calcite and aragonite.

To change in physical properties but not in substance. [R.]

A substance produced by acting upon uric with warm and very dilute nitric acid.

To reduce the purity of by mixing with a less valuable substance; as, to alloy gold with silver or copper, or silver with copper.

To refer to something indirectly or by suggestion; to have reference to a subject not specifically and plainly mentioned; -- followed by to; as, the story alludes to a recent transaction. These speeches . . . do seem to allude unto such ministerial garments as were then in use. Hooker.

er transported matter, made by rivers, floods, or other causes, upon land not permanently submerged beneath the waters of lakes or seas. Lyell.

Rays of relatively low penetrating power emitted by radium and other radioactive substances, and shown to consist of positively charged particles (perhaps particles of helium) having enormous velocities but small masses. They are slightly deflected by a strong magnetic or electric field.

That which alternates with something else; vicissitude. [R.] Grateful alternates of substantial. Prior.

ther, the neck of one into the bottom of another in succession; -- used in the process of sublimation. Ure.

A subsulphate of alumina and potash; alunite.

A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.

A spongy, combustible substance, prepared from fungus (Boletus and Polyporus) which grows on old trees; German tinder; punk. It has been employed as a styptic by surgeons, but its common use is as tinder, for which purpose it is prepared by soaking it in a strong solution of niter. Ure.

A characteristic crystalline substance, obtained from oil of bitter almonds.

A substance of the consistence of wax, found floating in the Indian Ocean and other parts of the tropics, and also as a morbid secretion in the intestines of the sperm whale (Physeter macrocephalus), which is believed to be in all cases its true origin. In color it is white, ash-gray, yellow, or black, and often varieg…