uraninite
         n 1: a mineral consisting of uranium oxide and trace amounts of
               radium and thorium and polonium and lead and helium;
               uraninite in massive form is called pitchblende which is
               the chief uranium ore [syn: {uraninite}, {pitchblende}]

English Dictionary: uranium	by the DICT Development Group
From WordNet (r) 3.0 (2006) [wn]:
uranium n a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons Synonym(s): uranium, U, atomic number 92
From WordNet (r) 3.0 (2006) [wn]:
uranium 235 n a uranium isotope with mass number 235; capable of sustaining chain reactions
From WordNet (r) 3.0 (2006) [wn]:
uranium 238 n the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239
From WordNet (r) 3.0 (2006) [wn]:
uranium ore n any ore from which uranium can be extracted
From WordNet (r) 3.0 (2006) [wn]:
Urim and Thummim n lots thrown to determine God's answers to yes-no questions
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Uranian \U*ra"ni*an\, a. (Astron.)       Of or pertaining to the planet Uranus; as, the Uranian year.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Uranin \U"ra*nin\, n. (Chem.)       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}.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Uraninite \U*ran"i*nite\, n. (Min.)       A mineral consisting chiefly of uranium oxide with some lead,       thorium, etc., occurring in black octahedrons, also in masses       with a pitchlike luster; pitchblende.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Uranium \U*ra"ni*um\, n. [NL., from Uranus the planet. See       {Uranus}.] (Chem.)       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.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Uranometry \U`ra*nom"e*try\, n. [Gr. [?] heaven + -metry.]       (Astron.)       A chart or catalogue of fixed stars, especially of stars       visible to the naked eye.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Urinometer \U`ri*nom"e*ter\, n. [Urine + -meter.]       A small hydrometer for determining the specific gravity of       urine.
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Urinometry \U`ri*nom"e*try\, n.       The estimation of the specific gravity of urine by the       urinometer.
From The Elements (22Oct97) [elements]:
uranium    Symbol: U    Atomic number: 92    Atomic weight: (231)    White radioactive metallic element belonging to the actinoids. Three    natural isotopes, U-238, U-235 and U-234. Uranium-235 is used as the fuel    for nuclear reactors and weapons. Discovered by Martin H. Klaproth in 1789.