praseodymium

American  

[prey-zee-oh-dim-ee-uhm, prey-see-] / ˌpreɪ zi oʊˈdɪm i əm, ˌpreɪ si- /

noun

Chemistry.

1. a rare-earth, metallic, trivalent element, named from its green salts. Pr; 140.91; 59; 6.77 at 20°C.

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praseodymium British  

/ 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

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praseodymium Scientific  

/ prā′zē-ō-dĭm′ē-əm /

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.

2. See Periodic Table

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Etymology

Origin of praseodymium

1880–85; < New Latin, equivalent to praseo- (combining form representing Greek prásios leek-green; see prase) + (di)dymium

Example Sentences

Probably also Neodymium and Praseodymium are two of them, for their weights are 143.6, 140.5.

From Occult Chemistry Clairvoyant Observations on the Chemical Elements by Sinnett, A. P.