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Radiation burn — Classification and external resources ICD 9 990 … Wikipedia
Alchemy — Alchemist redirects here. For other uses, see Alchemist (disambiguation). For other uses, see Alchemy (disambiguation). Page from alchemic treatise of Ramon Llull, 16th century Alchemy is an influential philosophical tradition whose early… … Wikipedia
Alchemy in history — Alchemy encompasses several philosophical traditions spanning some four millennia and three continents. These traditions general penchant for cryptic and symbolic language makes it hard to trace their mutual influences and genetic… … Wikipedia
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium

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