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praseodymium

[prey-zee-oh-dim-ee-uh m, prey-see-] /ˌpreɪ zi oʊˈdɪm i əm, ˌpreɪ si-/
noun, Chemistry
1.
a rare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; atomic weight: 140.91; atomic number: 59; specific gravity: 6.77 at 20°C.
Origin of praseodymium
1880-1885
1880-85; < New Latin, equivalent to praseo- (combining form representing Greek prásios leek-green; see prase) + (di)dymium
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for praseodymium

praseodymium

/ˌpreɪzɪəʊˈdɪmɪəm/
noun
1.
a malleable ductile silvery-white element of the lanthanide series of metals. It occurs principally in monazite and bastnaesite and is used with other rare earths in carbon-arc lights and as a pigment in glass. Symbol: Pr; atomic no: 59; atomic wt: 140.90765; valency: 3; relative density: 6.773; melting pt: 931°C; boiling pt: 3520°C
Word Origin
C20: New Latin, from Greek prasios of a leek-green colour + didymium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for praseodymium
n.

rare metallic element, 1885, coined in Modern Latin by discoverer Carl Auer von Welsbach (1858-1929) from Greek prasios "leek-green" (from prason "leek") + didymos "double," the name given to an earth in 1840, so called because it was a "twin" to lanthana. When didymia was further analyzed in the 1880s, it was found to have several components, one of which was characterized by green salts and named accordingly, with the elemental suffix -ium.

Online Etymology Dictionary, © 2010 Douglas Harper
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praseodymium in Medicine

praseodymium pra·se·o·dym·i·um (prā'zē-ō-dĭm'ē-əm, prā'sē-)
n.
Symbol Pr
A soft malleable ductile rare-earth element that develops a characteristic green tarnish in air and is used to color glass and ceramics yellow and in metallic alloy. Atomic number 59; atomic weight 140.908; melting point 931°C; boiling point 3,510°C; specific gravity 6.8; valence 3.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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praseodymium in Science
praseodymium
  (prā'zē-ō-dĭm'ē-əm)   
Symbol Pr
A soft, malleable, silvery metallic element of the lanthanide series that develops a green tarnish in air. It is used to add a yellow tint to glass and ceramics and to make the glass used in welding goggles. Atomic number 59; atomic weight 140.908; melting point 935°C; boiling point 3,127°C; specific gravity 6.8; valence 3, 4. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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