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praseodymium

[prey-zee-oh-dim-ee-uh m, prey-see-]
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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.
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Origin of praseodymium

1880–85; < New Latin, equivalent to praseo- (combining form representing Greek prásios leek-green; see prase) + (di)dymium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for praseodymium

Historical Examples

  • The salts of praseodymium are green in colour, and give a characteristic spark spectrum.

    Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4

    Various


British Dictionary definitions for praseodymium

praseodymium

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
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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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

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Online Etymology Dictionary, © 2010 Douglas Harper

praseodymium in Medicine

praseodymium

(prā′zē-ō-dĭmē-əm, prā′sē-)
n. Symbol Pr
  1. 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.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

praseodymium in Science

praseodymium

[prā′zē-ō-dĭmē-əm]
Pr
  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.