Definitions for Chromium
ˈkroʊ mi əmchromi·um

Princeton's WordNetRate this definition:2.0 / 1 vote

1. chromium, Cr, atomic number 24noun

   a hard brittle multivalent metallic element; resistant to corrosion and tarnishing

WiktionaryRate this definition:0.0 / 0 votes

1. chromiumnoun

   A metallic chemical element (symbol Cr) with an atomic number of 24.

WikipediaRate this definition:0.0 / 0 votes

1. Chromium

   Chromium is a chemical element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard, and brittle transition metal.Chromium metal is valued for its high corrosion resistance and hardness. A major development in steel production was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Stainless steel and chrome plating (electroplating with chromium) together comprise 85% of the commercial use. Chromium is also greatly valued as a metal that is able to be highly polished while resisting tarnishing. Polished chromium reflects almost 70% of the visible spectrum, and almost 90% of infrared light. The name of the element is derived from the Greek word χρῶμα, chrōma, meaning color, because many chromium compounds are intensely colored. Industrial production of chromium proceeds from chromite ore (mostly FeCr2O4) to produce ferrochromium, an iron-chromium alloy, by means of aluminothermic or silicothermic reactions. Ferrochromium is then used to produce alloys such as stainless steel. Pure chromium metal is produced by a different process: roasting and leaching of chromite to separate it from iron, followed by reduction with carbon and then aluminium. In the United States, trivalent chromium (Cr(III)) ion is considered an essential nutrient in humans for insulin, sugar, and lipid metabolism. However, in 2014, the European Food Safety Authority, acting for the European Union, concluded that there was insufficient evidence for chromium to be recognized as essential.While chromium metal and Cr(III) ions are considered non-toxic, hexavalent chromium, Cr(VI), is toxic and carcinogenic. According to the European Chemicals Agency (ECHA), chromium trioxide that is used in industrial electroplating processes is a "substance of very high concern" (SVHC).Abandoned chromium production sites often require environmental cleanup.

ChatGPTRate this definition:0.0 / 0 votes

1. chromium

   Chromium is a chemical element with the symbol Cr and atomic number 24. It is a hard, silvery-grey, lustrous metal that is highly resistant to tarnish. Chromium is known for its high corrosion resistance and hardness, and is a vital metal in many industrial applications, including stainless steel production, metal coatings, and as a pigment in glass and ceramics. It is also an essential trace mineral in the human body, used for metabolizing nutrients.

Webster DictionaryRate this definition:3.0 / 1 vote

1. Chromiumnoun

   a comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and calico printing. Called also chrome

2. Etymology: [NL., fr. Gr. color.]

WikidataRate this definition:0.0 / 0 votes

1. Chromium

   Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard and brittle metal which takes a high polish, resists tarnishing, and has a high melting point. It is also odorless and tasteless. The name of the element is derived from the Greek word "chrōma", meaning colour, because many of its compounds are intensely coloured. Chromium oxide was used by the Chinese in the Qin dynasty over 2,000 years ago to coat metal weapons found with the Terracotta Army. Chromium was discovered as an element after it came to the attention of the western world in the red crystalline mineral crocoite, discovered in 1761 and initially used as a pigment. Louis Nicolas Vauquelin first isolated chromium metal from this mineral in 1797. Since Vauquelin's first production of metallic chromium, small amounts of native chromium metal have been discovered in rare minerals, but these are not used commercially. Instead, nearly all chromium is commercially extracted from the single commercially viable ore chromite, which is iron chromium oxide. Chromite is also now the chief source of chromium for chromium pigments.

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

1. Chromium

   A trace element that plays a role in glucose metabolism. It has the atomic symbol Cr, atomic number 24, and atomic weight 52. According to the Fourth Annual Report on Carcinogens (NTP85-002,1985), chromium and some of its compounds have been listed as known carcinogens.

Editors ContributionRate this definition:0.0 / 0 votes

1. chromium

   An element.

   Chromium is a constituent of stainless steel and its related products.

   
   

   Submitted by MaryC on October 20, 2015  

Matched Categories

1. • Metallic Element

Usage in printed sourcesFrom: 

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How to pronounce Chromium?

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How to say Chromium in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Chromium in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of Chromium in Pythagorean Numerology is: 1

Examples of Chromium in a Sentence

1. Robert DePalma:

   But two of those were wildly different in composition. You had spikes in chromium and nickel and some other elements that are only common in meteoritic material and those fragments based on our preliminary analysis... are almost certainly of cosmic origin. this example of what might be a little tiny fragment, maybe micrograms, of the colliding asteroid -- the fact that a record of that is preserved, would be mind-blowing.

2. Donna Lisenby:

   The Cape Fear sample also had higher levels of chromium, lead, manganese and selenium.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Chromium
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Chromium
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Chromium
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/Chromium
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Chromium
7. ^ Usage in printed sources
   https://books.google.com/ngrams/graph?content=Chromium