praseodymium
[ prey-zee-oh-dim-ee-uh m, prey-see- ]
/ ˌpreɪ zi oʊˈdɪm i əm, ˌpreɪ si- /
noun Chemistry.
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
1880–85; < New Latin, equivalent to
praseo- (combining form representing Greek
prásios leek-green; see
prase) +
(di)dymium
Words nearby praseodymium
Example sentences from the Web for praseodymium
The salts of praseodymium are green in colour, and give a characteristic spark spectrum.
British Dictionary definitions for praseodymium
praseodymium
/ (ˌpreɪzɪəʊˈdɪmɪəm) /
noun
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 for praseodymium
C20: New Latin, from Greek
prasios of a leek-green colour +
didymium
Medical definitions for praseodymium
praseodymium
[ 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.
Scientific definitions for praseodymium
praseodymium
[ prā′zē-ō-dĭm′ē-əm ]
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.