Iridium

ahd-5
  • noun. A very dense, hard, and brittle, exceptionally corrosion-resistant, whitish-yellow metallic element occurring in platinum ores and used principally to harden platinum and in high-temperature materials, electrical contacts, and wear-resistant bearings. Atomic number 77; atomic weight 192.22; melting point 2,446°C; boiling point 4,428°C; specific gravity 22.562 (at 20°C); valence 2, 3, 4, 6. cross-reference: Periodic Table.
    • The Century Dictionary and Cyclopedia
  • noun. Chemical symbol, Ir; atomic weight, 193. A metal of silver-white color, belonging to the platinum family, and, so far as known, always present in native platinum.
    • the GNU version of the Collaborative International Dictionary of English
  • noun. A rare metallic element of atomic number 77, of the same group as platinum, which it much resembles, being silver-white and indifferent to most corrosive agents, but harder, more brittle, and with a higher melting temperature (2410° C, versus platinum 1772° C). With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.22.
    • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A metallic chemical element (symbol Ir) with an atomic number of 77.
    • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
    • Word Usage
    "The more common thicker photovoltaics contain iridium and other rare and expensive materials."
    Hypernym
    Words that are more generic or abstract
    metal  metallic element  
    Rhyme
    Words with the same terminal sound
    cryptosporidium  idiom  nephridium  presidium  
    Same Context
    Words that are found in similar contexts
    andaluminum  auriferous  bauxite  bef  classicrock  
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