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Having the property of fluorescence.

A blue, fluorescent, oily base (regarded as a derivative of pyridine), obtained from conine.

-red which it imparts to silk. It is also used for making a fine red ink. Its solution is fluorescent.

ed from the Æsculus hippocastanum, or horse- chestnut, and characterized by its fine blue fluorescent solutions. [Written also æsculin.]

wer which the substance has of modifying the light incident upon it. The light emitted by fluorescent substances is in general of lower refrangibility than the incident light. Stockes.

ect, as the human body, by exposing it to the X rays and observing the shadow cast upon a fluorescent screen; cryptoscopy.

ng the residue. It is a yellowish, fatlike mass, transparent in thin layers, and somewhat fluorescent. It is used as a bland protective dressing, and as a substitute for fatty materials in ointments. U. S. Pharm.

ith phthalic acid, and well represented by phenol phthaleïn. Their alkaline solutions are fluorescent. Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids, and as this reaction is exceedingly delica…

Esculin; -- so called in allusion to its fluorescent solutions. [R.]

A picture produced by the Röntgen rays upon a sensitive surface, photographic or fluorescent, especially a picture of opaque objects traversed by the rays.

is capable of passing through many bodies opaque to light, and producing photographic and fluorescent effects by which means pictures showing the internal structure of opaque objects are made, called radiographs, or sciagraphs. So called from the discoverer, W. C. Röntgen. -- X ray, the Röntgen ray; -- so called by it…

many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Röntgen. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are regarded as nonperiodic, transverse pulses…

A hydrocarbon (C13H10) obtained in white fluorescent crystals, in the distillation products of the needles of the California "big tree" (Sequoia gigantea).

small instrument containing a minute particle of a radium compound mounted in front of a fluorescent screen and viewed with magnifying lenses. The tiny flashes produced by the continual bombardment of the screen by the a rays are thus rendered visible. -- Spin*thar`i*scop"ic (#), a.

A beautiful fluorescent crystalline substance, intermediate in composition between thionol and thionine.