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didymium
di·dym·i·um D0210600 (dī-dĭm′ē-əm)n.1. A metallic mixture, once considered an element, composed of neodymium and praseodymium.2. A mixture of rare-earth elements and their oxides used chiefly in manufacturing and in coloring various forms of glass.
[From Greek didumos, twin, double (from the fact that it was usually found associated with the previously discovered lanthanum ); see dwo- in Indo-European roots.]didymium (daɪˈdɪmɪəm; dɪ-) n1. (Elements & Compounds) a mixture of the metallic rare earths neodymium and praseodymium, once thought to be an element2. (Elements & Compounds) a mixture of rare earths and their oxides used in colouring glass3. (Colours) a mixture of rare earths and their oxides used in colouring glass[C19: from New Latin, from Greek didumos twin + -ium]di•dym•i•um (daɪˈdɪm i əm, dɪ-)
n. a mixture of neodymium and praseodymium formerly thought to be an element. Symbol: Di [< Greek dídym(os) twin (see didymous) + New Latin -ium -ium2; so named by Swedish chemist Carl Mosander (1797–1858), who discovered it in 1843, from its close association with lanthanum] didymium
didymium[dī′dim·ē·əm] (chemistry) A mixture of the rare-earth elements praeseodymium and neodymium. Abbreviated Di. |