Didymium — (Greek: twin element) is a mixture of the elements praseodymium and neodymium. It is used in safety glasses for glassblowing and blacksmithing, especially when a gas (propane) powered forge is used, where it provides a filter which selectively… … Wikipedia
Didymium — in the first edition periodic table of Mendeleev Le didymium est un mélange du praséodyme et de néodyme, deux éléments simples. On l utilise pour faire des verres qui arrêtent efficacement la lumière émise par le sodium en fusion, tout en… … Wikipédia en Français
Didymium — ist: eine Gattung innerhalb der Schleimpilze, siehe Didymium (Schleimpilze) ein Synonym für Didym, eine Legierung zweier seltener Erden Diese Seite ist eine Begriffsklärung zur Unterscheidung mehrerer … Deutsch Wikipedia
Didymium — Di*dym i*um, n. [NL., fr. Gr. ? twin.] (Chem.) A rare metallic substance usually associated with the metal cerium; hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances … The Collaborative International Dictionary of English
Didymĭum — (D. Schrad., Lk.), Pilzgattung aus der Familie der Gasteromycetes Trichospermei Physarei … Pierer's Universal-Lexikon
didymium — [dī dim′ē əm] n. [ModL: so named (1841) by C. G. Mosander (see LANTHANUM) < Gr didymos, twin (because assoc. with lanthanum) + IUM] 1. a rare metal, formerly considered an element but later found to be a mixture of rare earth elements… … English World dictionary
Didymium wildpretii — Scientific classification Kingdom: Amoebozoa Phylum: Mycetozoa Class … Wikipedia
didymium — noun Etymology: New Latin, from Greek didymos twin, from dyo two more at two Date: 1842 a mixture of rare earth elements made up chiefly of neodymium and praseodymium and used especially for coloring glass for optical filters … New Collegiate Dictionary
didymium — /duy dim ee euhm, di /, n. Chem. a mixture of neodymium and praseodymium, formerly thought to be an element. Symbol: Di [ < NL < Gk dídym(os) twin (see DIDYMOUS) + IUM; so named by Swedish chemist Carl Mosander (1797 1858), who discovered it in… … Universalium
didymium — noun A mixture of praseodymium and neodymium once thought to be an element (symbol Di) … Wiktionary
] ds Lar. 19e Suppl. 1890, Nouv. Lar. ill. Ds QUILLET 1965 on admet également, s.v. didymium ou didymion le nom d'un champignon. Étymol. et Hist. 1. 1857 didyme (CHESN.); 2. 1890 didymium (Lar. 19e Suppl.). 1 nom d'un métal découvert en 1842 par le chimiste suédois C.-G. Mosander, empr. au gr. 
« double, jumeau », ce métal ne se trouvant que mêlé au cerium (CHESN.); 2 dér. de didyme; suff. -ium. Fréq. abs. littér. :4.