photon
Biology

photon


Term: photon
Literally meaning: ?that carry light?
Origin: Anc Greek
???/phos(=light) > (genitive ?????/photos=of  light)
Coined/History
by Gilbert Lewis in 1926, though the concept of light in the form of discrete particles had been known.
Definition
  1. (physics) photon is defined as a quantum of electromagnetic energy including light with  no mass or electric charge.  A photon has energy which is proportional to the frequency  of the radiation
  2.  (biology) Photon is a unit of retinal illumination, equal to the amount of light that reaches the retina through 1 square millimeter of pupil area from a surface having a brightness of 1 candela per square meter.




- Rhodopsin
Term: rhodopsinLiterally meaning: ?redish-purple visual ?Origin: Anc Greek?????/rodon(=rose) >????/rode(=rosebush) >???????/radanos(=soft, delicate, smooth)+??/ops(=sight, face, vision) Coined/HistoryRhodopsin named because of its redish-purple...

- Phosphilipid
Term: phospholipidLiterally meaning:Origin: Anc Greek???/phos(=light) > (genitive ?????/photos=of  light) + ?????/?????(=fat, grease) >????? > verb ?????/livo(=grease)+????/-idio(=ide, suffix meaning a member or a part of group) Coined/History(?)DefinitionPhospholipids...

- Photalgia
Term: photalgiaLiterally meaning: "pain caused by light"Origin: Anc Greek???/phos(=light) > (genitive ?????/photos=of  light) + ?????/algos(=ache, pain) > ??????/loigos(=pain, sorrow)Coined/History(?)DefinitionPhottalgia is the pain caused...

- Photolysis
Term: photolysisLiterally meaning: ?decomposition caused by light?Origin: Anc Greek???/phos(=light) > (genitive ?????/photos=of  light) +?????/lysis(=dissolution, degradation, decomposition)  > verb ???/leo =break down, solve, loose, degradate)Coined/History(?)Definition(chemistry)...

- Phototropism
Term: phototropismLiterally meaning: ?tendency to light?Origin: Anc Greek???/phos(=light) > (in the genitive) ?????/photos(=of light) +-??????/tropos(=suffix denoting way, habit, direction or tendency) >?????/trepo(=turn)Coined/HistoryDefinitionPhototropism...



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