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ncreatic digestion, by putrefaction as of cheese, by the action of boiling acids, etc. Chemically, it consists of oxyphenol and amidopropionic acid, and by decomposition yields oxybenzoic acid, or some other benzol derivative. [Written also tyrosine.]

d cheese and other dairy products, and producing symptoms similar to cholera infantum. Chemically, it appears to be related to, or identical with, diazobenzol.

Being without symmetry of chemical structure or relation; as, an unsymmetrical carbon atom. Unsymmetrical carbon atom (Chem.), one which is united at once to four different atoms or radicals. This condition usually occasions physical isomerism, with the attendant action on polarized light.

Of or pertaining to the heavens; celestial; astronomical. On I know not what telluric or uranic principles. Carlyle.

in a cool place, in the form of a reddish yellow sediment, nearly always crystalline. Chemically, it is composed of carbon, hydrogen, nitrogen, and oxygen, C5H4N4O3, and by decomposition yields urea, among other products. It can be made synthetically by heating together urea and glycocoll. It was formerly called also…

of organic cells, either containing air, or a pellucid watery liquid, or some special chemical secretions of the cell protoplasm. Contractile vacuole. (Zoöl.) See under Contractile, and see Illusts. of Infusoria, and Lobosa. -- Food vacuole. (Zoöl.) See under Food, and see Illust. of Infusoria.

h a brush, or otherwise. When applied the varnish soon dries, either by evaporation or chemical action, and the resinous part forms thus a smooth, hard surface, with a beautiful gloss, capable of resisting, to a greater or less degree, the influences of air and moisture.

A large vessel, cistern, or tub, especially one used for holding in an immature state, chemical preparations for dyeing, or for tanning, or for tanning leather, or the like. Let him produce his vase and tubs, in opposition to heaps of arms and standards. Addison.

ated from the ancient use of the metal in making mirrors, a mirror being still the astronomical symbol of the planet Venus. [Archaic]

A group of minerals having, a micaceous structure. They are hydrous silicates, derived generally from the alteration of some kind of mica. So called because the scales, when heated, open out into wormlike forms.

A probable chemical element discovered by Sir William Crookes in 1898. Its nitrate is obtained byy practical decomposition and crystallization of yttrium nitrate. At. wt., about 117.

h the visual rays unite; the position of the eye. -- Visual purple (Physiol.), a photochemical substance, of a purplish red color, contained in the retina of human eyes and in the eyes of most animals. It is quickly bleached by light, passing through the colors, red, orange, and yellow, and then disappearing. Also cal…

functions of a living organism are due to an unknown vital principle distinct from all chemical and physical forces.

g to Alessandro Volta, who first devised apparatus for developing electric currents by chemical action, and established this branch of electric science; discovered by Volta; as, voltaic electricity.

That form of electricity which is developed by the chemical action between metals and different liquids; voltaic electricity; also, the science which treats of this form of electricity; -- called also galvanism, from Galvani, on account of his experiments showing the remarkable influence of this agent on animals.…

ltaic electricity passing through it, by its effect in decomposing water or some other chemical compound acting as an electrolyte.

exhibiting to the eye the changes of volume of a gas or gaseous mixture resulting from chemical action, and the like.

Same as Nux vomica.

Hollander a vomit. Shak. Black vomit. (Med.) See in the Vocabulary. -- Vomit nut, nux vomica.

regarded in certain mathematical speculations as the typical form and structure of the chemical atom. -- Vortex wheel, a kind of turbine.