- iridium
-
A metallic chemical element (symbol Ir) with an atomic number of 77.See Also: iridescence, iridin, iridiosmium, iridise, iridize, iris
Wikipedia foundation.
iridium
Look at other dictionaries:
Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… … Wikipedia
iridium — [ iridjɔm ] n. m. • 1805; lat. iris, iridis « arc en ciel », à cause des couleurs variées qu offrent les combinaisons de ce métal ♦ Chim. Élément (Ir; no at. 77; m. at. 192), métal blanc très dur, cassant. L iridium s extrait de certains minerais … Encyclopédie Universelle
Iridium-33 — Caractéristiques Organisation Iridium Domaine Télécommunications Masse 700 kg … Wikipédia en Français
Iridium 33 — Caractéristiques Organisation Iridium Domaine Télécommunications Masse 700 kg Lancement 14 septembre 1997 Lanceur … Wikipédia en Français
Iridium 33 — Réplica del Iridium 33 Organización Iridium Bus LM 700A Tip … Wikipedia Español
iridium — Symbol: Ir Atomic number: 77 Atomic weight: 192.217 Very hard and brittle, silvery metallic transition element. It has a yellowish cast to it. Salts of iridium are highly colored. It is the most corrosion resistant metal known, not attacked by… … Elements of periodic system
iridium — i*rid i*um ([ i]*r[i^]d [i^]*[u^]m), n. [NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See {Iris}.] (Chem.) A rare metallic element of atomic number 77, of the same group as platinum, which it… … The Collaborative International Dictionary of English
Iridium [2] — Iridium Ir (Atomgew. 192,5, spez. Gew. 22,4), graues, hartes Metall der Platingruppe; Schmelzpunkt höher als der des Platins, ca. 2500° C. Es findet sich in Begleitung mit den übrigen Platinmetallen als seltenstes Element dieser Gruppe stets… … Lexikon der gesamten Technik
Iridium — es el nombre de una constelación de 66 satélites de comunicaciones girando alrededor de la Tierra, en 11 órbitas longitudinales de 6 satélites cada una, diseñados por Motorola para proveer servicios de Telefonía Satelital Móvil (TSM) con… … Enciclopedia Universal
iridium — IRÍDIUM s.n. v. iridiu. Trimis de gall, 13.09.2007. Sursa: DEX 98 IRÍDIUM s.n. v. iridiu. Trimis de LauraGellner, 13.09.2007. Sursa: DN … Dicționar Român
iridium — [ī rid′ē əm, i rid′ē əm] n. [ModL: so named (1804) by S. Tennant (1761 1815), Eng chemist < Gr iris (gen. iridos), IRIS, because its salts have varied colors; + IUM] a white, extremely dense, brittle, corrosion resistant chemical element, one… … English World dictionary
