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.
[1913 Webster]

Uranium was discovered in the state of an oxide by Klaproth in 1789, and so named in honor of Herschel's discovery of the planet Uranus in 1781.
[1913 Webster]

{

U"ran-o`cher

,

U"ran-o`chre

} (?), n. [Cf. F. uranochre.] (Min.) (a) A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.
[1913 Webster]

{

U`ra*no*graph"ic

(?),

U`ra*no*graph"ic*al

(?), } a. Of or pertaining to uranography; as, an uranographic treatise.
[1913 Webster]

 

New - Add Dictionary Search to Your Site

You can add a free dictionary search box to your own web site by copying and pasting the following HTML into one of your web pages:

<form action="http://www.freedict.co.uk/search.php" method="post">
 <p style="text-align: center; font-family: sans-serif;">
  <a style="font-weight: bold;" href="http://www.freedict.co.uk/"
     title="FreeDict free online dictionary">FreeDict</a>
  <input type="text" name="word" size="20" value="" />
  <input type="submit" name="submit" value="Search Dictionary" />
 </p>
</form>

 

a b c d e f g h i j k l m n o p q r s t u v w x y z

Mon 10th December 2018