Search:uranium -> URANIUM
uranium
u r a n i u m hex:#117;#114;#97;#110;#105;#117;#109;
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- Uranium - n. - 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 used as a pigment in porcelain painting. Symbol U. Atomic weight 239.
- Uraninite - n. - A mineral consisting chiefly of uranium oxide with some lead, thorium, etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.
- Gummite - n. - A yellow amorphous mineral, essentially a hydrated oxide of uranium derived from the alteration of uraninite.
- Uranyl - n. - The radical UO2, conveniently regarded as a residue of many uranium compounds.
- Uranous - a. - Pertaining to, or containing, uranium; designating those compounds in which uranium has a lower valence as contrasted with the uranic compounds.
- Uranite - n. - A general term for the uranium phosphates, autunite, or lime uranite, and torbernite, or copper uranite.
- Torbernite - n. - A mineral occurring in emerald-green tabular crystals having a micaceous structure. It is a hydrous phosphate of uranium and copper. Called also copper uranite, and chalcolite.
- Uranic - a. - Pertaining to, resembling, or containing uranium; specifically, designating those compounds in which uranium has a valence relatively higher than in uranous compounds.
- Uranin - n. - An alkaline salt of fluorescein, obtained as a brownish red substance, which is used as a dye; -- so called from the peculiar yellowish green fluorescence (resembling that of uranium glass) of its solutions. See Fluorescein.