单词 | palladium |
释义 | palladium1/pəˈleɪdɪəm![]() noun [mass noun] The chemical element of atomic number 46, a rare silvery-white metal resembling platinum. (Symbol: Pd) To this group belong the important steel alloying elements nickel and manganese, as well as cobalt and the inert metals ruthenium, rhodium, palladium, osmium, iridium and platinum....
OriginEarly 19th century: modern Latin, from Pallas, the name given to an asteroid discovered just before the element (see Pallas). Rhymespalladium2/pəˈleɪdɪəm![]() noun (plural palladia /pəˈleɪdɪə/) archaic A safeguard or source of protection: he regarded himself as the palladium of the American cause...
OriginLate Middle English (in the Greek sense): via Latin from Greek palladion, denoting an image of the goddess Pallas (Athene), on which the safety of Troy was believed to depend. |
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