ONLINE
ETYMOLOGY DICTIONARY:
- praseodymium (n.)
- rare metallic element, 1885, coined in Modern Latin by discoverer Carl Auer von Welsbach (1858-1929) from Gk. prasios "leek-green" (from prason "leek") + didymos /twin/"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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