Editing Cyan (section)

==In science and nature==

===Color of water===
* Pure water is nearly colorless. However, it does [[water absorption|absorb]] slightly more red light than blue, giving significant volumes of water a bluish tint; increased scattering of blue light due to fine particles in the water shifts the blue color toward green, for a typically cyan net color.<ref>{{cite book|title = Clouds in a Glass of Beer: Simple Experiments in Atmospheric Physics|author = Craig F. Bohren|publisher = Courier Dover Publications|year = 2001|isbn = 0-486-41738-7|url = https://books.google.com/books?id=CZuNCZqtZZUC&pg=PA156 }}</ref>

===Cyan and cyanide===
* [[Cyanide]] derives its name from [[Prussian blue]], a blue pigment containing the cyanide ion.<ref>{{Cite book|url=https://books.google.com/books?id=GfqpDQAAQBAJ&pg=PA572|title=Colour Design: Theories and Applications|last=Best|first=Janet|date=2017-06-08|publisher=Woodhead Publishing|isbn=9780081018897|language=en}}</ref>

===Bacteria===
* [[Cyanobacteria]] (sometimes called blue-green algae) are an important link in the [[food chain]].<ref>{{Cite book |url=https://books.google.com/books?id=MdvdCgAAQBAJ&q=Cyanobacteria+%28sometimes+called+blue-green+algae%29+are+an+important+link+in+the+food+chain.&pg=PR23 |title=Impact of Water Pollution on Human Health and Environmental Sustainability |last=A. Elaine |first=McKeown |date=2015-10-27 |publisher=IGI Global|isbn=9781466695603|language=en}}</ref>

===Astronomy===
* The [[planet]] [[Uranus]] is colored cyan because of the abundance of [[methane]] in its [[atmosphere]]. Methane absorbs red light and reflects the blue-green light which allows observers to see it as cyan.<ref>{{Cite news |url=https://www.nasa.gov/mission_pages/voyager/pia00032.html |title=Uranus in True and False Color |date=2015-04-02 |publisher=NASA |access-date=2017-09-28}}</ref>

===Energy===
* [[Natural gas]] (methane), used by many for [[home cooking]] on [[gas stove]]s, has a cyan colored [[flame]] when burned with a mixture of air.<ref>{{Cite web|url=http://www.elgas.com.au/blog/1585-why-does-a-gas-flame-burn-blue-lpg-gas-natural-propane-methane|title=Gas Flame Colour Temperature Chart (Yellow Flame vs Blue Flame)|last=Hahn|first=Eric|website=ELGAS – LPG Gas for Home & Business|access-date=2017-11-10}}</ref>

===Photography and film===
* [[Cyanotype]], or [[blueprint]], a [[monochrome photography|monochrome]] [[List of photographic processes|photographic printing process]] that predates the use of the word ''cyan'' as a color, yields a deep ''cyan-blue'' colored print based on the Prussian blue pigment.<ref>{{cite book|title = Cyanotype: the history, science and art of photographic printing in Prussian blue|author = Mike Ware|url = https://books.google.com/books?id=C-7I69gFIbMC&pg=PA21 |publisher = NMSI Trading Ltd|year = 1999|isbn = 1-900747-07-3}}</ref>
* [[Cinecolor]], a bi-pack color process, the photographer would load a standard camera with two films, one orthochromatic, dyed red, and a panchromatic strip behind it. Color light would expose the cyan record on the ortho stock, which also acted as a filter, exposing only red light to the panchromatic film stock.<ref>Belton, John (2000): CinecoIor. In: ''Film History, ''12,4, Color Film (2000), pp. 344–357.</ref><ref>{{Cite web|url=http://www.widescreenmuseum.com/oldcolor/cinecolor2.htm|title=Cinecolor|website=widescreenmuseum.com|access-date=2017-11-10}}</ref>

===Medicine===
* [[Cyanosis]] is an abnormal blueness of the skin, usually a sign of poor oxygen intake; patients are typically described as being "cyanotic".<ref name=Mosby>{{cite book |title=[[Mosby's Medical, Nursing & Allied Health Dictionary]] |series=Mosby-Year Book |year=1994 |page=425 |edition=4th}}</ref>
* [[Cyanopsia]] is a [[color blindness|color vision defect]] where vision is tinted blue. This can be a [[Adverse effect|drug-induced side effect]] or experienced after [[cataract]] removal.