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e, alloxantin, and other ureids, as a white, or yellowish, crystalline which turns red on exposure to the air; -- called also uramil, dialuramide, and formerly purpuric acid.

s converted into steel by the addition of wrought iron, or iron ore and manganese, and by exposure to heat in an open-hearth furnace; -- also called the Siemens-Martin process, from the inventors. -- Open-hearth steel, steel made by an open-hearth process; -- also called Siemens-Martin steel. -- Open newel. (Arch.) S…

Changing color by exposure Mohs.

A condition of the muscles induced by exposure to severe cold, in which the electrical action of the muscle is reversed.

Pasteur for preventing or checking fermentation in fluids, such as wines, milk, etc., by exposure to a temperature of 140º F., thus destroying the vitality of the contained germs or ferments.

Danger; risk; hazard; jeopardy; exposure of person or property to injury, loss, or destruction. In perils of waters, in perils of robbers. 2 Cor. xi. 26. Adventure hard With peril great achieved. Milton. At, or On, one's peril, with risk or danger to one; at the hazard of. "On thy soul's peril." Shak.…

nt bodies. Bologna phosphorus (Chem.), sulphide of barium, which shines in the dark after exposure to light; -- so called because this property was discovered by a resident of Bologna. The term is sometimes applied to other compounds having similar properties. -- Metallic phosphorus (Chem.), an allotropic modification…

A cell (as one of two electrodes embedded in selenium) which by exposure to light generates an electric current.

owth of the upper surface of dorsiventral organs, such as leaves, through the stimulus of exposure to light. Encyc. Brit.

s of obtaining pictures, as on chemically prepared paper, from photographic negatives, by exposure to light.

Luminescent by exposure to light waves. -- Pho`to*lu`mi*nes"cence (#), n.

A motile condition in plants resulting from exposure to light. -- Pho`to*ton"ic, a.

Condition; state; -- risk, or exposure to danger, often being implied; as, a luckless plight. "Your plight is pitied." Shak. To bring our craft all in another plight Chaucer.

frame (Photog.), a shallow box, usually having a glass front, in which prints are made by exposure to light. -- Printing house, a printing office. -- Printing ink, ink used in printing books, newspapers, etc. It is composed of lampblack or ivory black mingled with linseed or nut oil, made thick by boiling and burning…

With exposure to popular view or notice; without concealment; openly; as, property publicly offered for sale; an opinion publicly avowed; a declaration publicly made.

Any one of several substances or mixtures which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.

. Reduced iron (Chem.), metallic iron obtained through deoxidation of an oxide of iron by exposure to a current of hydrogen or other reducing agent. When hydrogen is used the product is called also iron by hydrogen. -- To reduce an equation (Alg.), to bring the unknown quantity by itself on one side, and all the known…

danger, or evil; to liberate from actual restraint; to remove or withdraw from a state of exposure to evil; as, to rescue a prisoner from the enemy; to rescue seamen from destruction. Had I been seized by a hungry lion, I would have been a breakfast to the best, Rather than have false Proteus rescue me. Shak.…

tem of lines forming small squares of standard size, which is photographed, by a separate exposure, on the same plate with star images to facilitate measurements, detect changes of the film, etc.

Hazard; danger; peril; exposure to loss, injury, or destruction. The imminent and constant risk of assassination, a risk which has shaken very strong nerves. Macaulay.