platiniridium
Webster Dictionary
a natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum
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platina
(ˈplæt n ə, pləˈti nə)
Random House Webster's College Dictionary
a native alloy of platinum with palladium, iridium, or osmium.
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iridosmine
(ˌɪr ɪˈdɒz mɪn, -ˈdɒs-)
Random House Webster's College Dictionary
a native alloy of iridium and osmium, usu. containing some rhodium, ruthenium, platinum, etc., used esp. for the points of gold pens.
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osmiridium
(osmiridium, iridosmine)
Princeton's WordNet
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
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iridosmine
(osmiridium, iridosmine)
Princeton's WordNet
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc.
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catalytic converter
(catalytic converter)
Princeton's WordNet
a converter that uses a platinum-iridium catalyst to oxidize pollutants and carbon monoxide into carbon dioxide and water; an antipollution device on an automotive exhaust system
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ruthenium
Webster Dictionary
a rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum
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kilogram
(ˈkɪl əˌgræm)
Random House Webster's College Dictionary
a unit of mass equal to 1000 grams: the base SI unit of mass; its international prototype, a platinum-iridium cylinder, is kept in Sèvres, France.
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atomic number 45
(rhodium, Rh, atomic number 45)
Princeton's WordNet
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
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rhodium
(rhodium, Rh, atomic number 45)
Princeton's WordNet
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
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rh
(rhodium, Rh, atomic number 45)
Princeton's WordNet
a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
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iridious
Webster Dictionary
of or pertaining to iridium; -- applied specifically to compounds in which iridium has a low valence
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iridic
Webster Dictionary
of or pertaining to iridium; -- said specifically of those compounds in which iridium has a relatively high valence
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ruthenium
(ruthenium, Ru, atomic number 44)
Princeton's WordNet
a rare polyvalent metallic element of the platinum group; it is found associated with platinum
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atomic number 44
(ruthenium, Ru, atomic number 44)
Princeton's WordNet
a rare polyvalent metallic element of the platinum group; it is found associated with platinum
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ru
(ruthenium, Ru, atomic number 44)
Princeton's WordNet
a rare polyvalent metallic element of the platinum group; it is found associated with platinum
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pd
(palladium, Pd, atomic number 46)
Princeton's WordNet
a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
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palladium
(palladium, Pd, atomic number 46)
Princeton's WordNet
a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
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atomic number 46
(palladium, Pd, atomic number 46)
Princeton's WordNet
a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
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iridium
(iridium, Ir, atomic number 77)
Princeton's WordNet
a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
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atomic number 77
(iridium, Ir, atomic number 77)
Princeton's WordNet
a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
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ir
(iridium, Ir, atomic number 77)
Princeton's WordNet
a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
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rhodium
Webster Dictionary
a rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.1. Specific gravity 12
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palladium
Webster Dictionary
a rare metallic element of the light platinum group, found native, and also alloyed with platinum and gold. It is a silver-white metal resembling platinum, and like it permanent and untarnished in the air, but is more easily fusible. It is unique in its power of occluding hydrogen, which it does to the extent of nearly a thousand volumes, forming the alloy Pd2H. It is used for graduated circles and verniers, for plating certain silver goods, and somewhat in dentistry. It was so named in 1804 by Wollaston from the asteroid Pallas, which was discovered in 1802. Symbol Pd. Atomic weight, 106.2
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sperrylite
Webster Dictionary
an arsenide of platinum occuring in grains and minute isometric crystals of tin-white color. It is found near Sudbury, Ontario Canada, and is the only known compound of platinum occuring in nature
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iridic
(iridic)
Princeton's WordNet
of or containing iridium
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ir
(ˈki tɔs)
Random House Webster's College Dictionary
iridium.
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iridize
Webster Dictionary
to point or tip with iridium, as a gold pen
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iridic
(ɪˈrɪd ɪk)
Random House Webster's College Dictionary
of or containing iridium, esp. in the tetravalent state.
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pt
(ˈsaɪˌwɔr)
Random House Webster's College Dictionary
platinum.
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