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Iridium   /ɪrˈɪdiəm/   Listen
Iridium

noun
1.
A heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium.  Synonyms: atomic number 77, Ir.






WordNet 3.0 © 2010 Princeton University








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"Iridium" Quotes from Famous Books



... [prob. from folklore's 'golden egg'] When used to describe a magnetic medium (e.g., 'golden disk', 'golden tape'), describes one containing a tested, up-to-spec, ready-to-ship software version. Compare {platinum-iridium}. ...
— The Jargon File, Version 4.0.0

... depths of the chameleon's skin, and sometimes spread out on its surface in an interlacing network of brown or purple. In addition to this prime colouring matter, however, the animal also possesses a normal yellow pigment, and a bluish layer in the skin which acts like the iridium glass so largely employed by Dr. Salviati, being seen as straw-coloured with a transmitted light, but assuming a faint lilac tint against an opaque absorbent surface. While sleeping the chameleon ...
— Falling in Love - With Other Essays on More Exact Branches of Science • Grant Allen

... "here is a top made of platinum, the heaviest of metals, except iridium—which it would be impossible to procure enough of, and which would be difficult to work into the proper shape. It is surrounded you will observe, by an air-tight receiver, communicating by this tube with a powerful air-pump. The plate upon which the point of the top rests ...
— Annals of a Quiet Neighbourhood • George MacDonald

... proceeded to the safe, but it was opened as they had expected. The six-inch tungsto-iridium wall had been melted through. Even this unbelievable fact no longer surprised them. They only glanced at the metal, still too hot to touch, and looked about the room. The bonds had been taken. But now they noticed that over the mail-clerk's desk there had been fastened a small envelope. ...
— The Black Star Passes • John W Campbell

... instances of remarkable similarity of properties. Thus there is a strong resemblance between platinum and iridium; bromine and iodine; iron, manganese, and magnesium; cobalt and nickel; phosphorus and arsenic; but this resemblance consists mainly in their forming isomorphous compounds in which these elements exist in the same relative proportion. These compounds ...
— Familiar Letters of Chemistry • Justus Liebig

... sufficiently known, From about 1800 to 1835 the number of proposed substitutes for the quill pen was very considerable. Horn pens, tortoise-shell pens, nibs of diamond or ruby imbedded in tortoise shell, nibs of ruby set in fine gold, nibs of rhodium and of iridium imbedded in gold,— all have been adopted at different times, but most of them have been found too costly for general adoption. Steel is proved to be sufficiently elastic and durable to form very good pens, ...
— Forty Centuries of Ink • David N. Carvalho



Words linked to "Iridium" :   metallic element, ir, metal, atomic number 77



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