Definitions for iridium
ɪˈrɪd i əmirid·i·um

Princeton's WordNetRate this definition:0.0 / 0 votes

1. iridium, Ir, atomic number 77noun

   a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium

GCIDERate this definition:0.0 / 0 votes

1. iridiumnoun

   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

WiktionaryRate this definition:0.0 / 0 votes

1. iridiumnoun

   A metallic chemical element (symbol Ir) with an atomic number of 77.

2. Etymology: ἶρις (because of the bright colour of many of iridium's salts)

WikipediaRate this definition:0.0 / 0 votes

1. Iridium

   Iridium is a chemical element with the symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm3 (0.815 lb/cu in) as defined by experimental X-ray crystallography. It is one of the most corrosion-resistant metals, even at temperatures as high as 2,000 °C (3,630 °F). However, corrosion-resistance is not quantifiable in absolute terms; although only certain molten salts and halogens are corrosive to solid iridium, finely divided iridium dust is much more reactive and can be flammable, whereas gold dust is not flammable but can be attacked by substances that iridium resists, such as aqua regia. Iridium was discovered in 1803 among insoluble impurities in natural platinum. Smithson Tennant, the primary discoverer, named it after the Greek goddess Iris, personification of the rainbow, because of the striking and diverse colors of its salts. Iridium is one of the rarest elements in Earth's crust, with annual production and consumption of only 3 tonnes (6.6 thousand pounds). 191Ir and 193Ir are the only two naturally occurring isotopes of iridium, as well as the only stable isotopes; the latter is the more abundant. The dominant uses of iridium are the metal itself and its alloys, as in high-performance spark plugs, crucibles for recrystallization of semiconductors at high temperatures, and electrodes for the production of chlorine in the chloralkali process. Important compounds of iridium are chlorides and iodides in industrial catalysis. Iridium is a component of some OLEDs. Iridium is found in meteorites in much higher abundance than in the Earth's crust. For this reason, the unusually high abundance of iridium in the clay layer at the Cretaceous–Paleogene boundary gave rise to the Alvarez hypothesis that the impact of a massive extraterrestrial object caused the extinction of dinosaurs and many other species 66 million years ago, now known to be produced by the impact that formed the Chicxulub crater. Similarly, an iridium anomaly in core samples from the Pacific Ocean suggested the Eltanin impact of about 2.5 million years ago.It is thought that the total amount of iridium in the planet Earth is much higher than that observed in crustal rocks, but as with other platinum-group metals, the high density and tendency of iridium to bond with iron caused most iridium to descend below the crust when the planet was young and still molten.

ChatGPTRate this definition:0.0 / 0 votes

1. iridium

   Iridium is a chemical element with the symbol Ir and atomic number 77. It is a dense, ductile, very hard, brittle, silver-white metal of the platinum group. Iridium is considered to be the second-densest metal after osmium. It is also the most corrosion-resistant metal, even at temperatures as high as 2000 °C, and is used in many high-temperature and heavy-duty applications.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Iridiumnoun

   a rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5

2. Etymology: [NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris.]

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Iridium

   ī-rid′i-um, n. the most infusible, and one of the heaviest, of the metals, found associated with the ore of platinum, so called from the iridescence of some of its solutions.—n. Iridos′mium, a native compound of iridium and osmium, used for pointing gold pens. [Gr. iris, iridos, the rainbow.]

The Nuttall EncyclopediaRate this definition:0.0 / 0 votes

1. Iridium

   a metallic elementary body of rare occurrence, and found in the ores of platinum.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Iridium

   A metallic element with the atomic symbol Ir, atomic number 77, and atomic weight 192.22.

Matched Categories

1. • Metallic Element

How to pronounce iridium?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say iridium in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of iridium in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of iridium in Pythagorean Numerology is: 2

Examples of iridium in a Sentence

1. Louise Hartley:

   You have the antenna attached to the top here, and then you would have a battery pack attached to the bottom here. When an image is taken there's a separate unit called the satellite node, and the images are sent via radio frequency to the satellite node and then the satellite node uses the Iridium Satellite Network to send that image to where you need it.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=iridium
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=iridium
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Iridium
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Iridium
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/iridium
7. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=iridium
8. ^ The Nuttall Encyclopedia
   https://www.gutenberg.org/cache/epub/12342/pg12342-images.html#Iridium