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IR See INTERNAL REFLECTION.
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Toxicology , Toxicology is the scientific study of poisons (toxins). Major topics in toxicology include the detection and chemical analysis of poisons, the study… Chemicals , The general public often construes the word "chemical" to mean a harmful synthetic substance. In fact, however, the term applies to any element or co… Mg , MG • abbr. ∎ machine gun. ∎ hist. Morris Garages. mg • symb. the chemical element magnesium. mg • abbr. milligram(s): 100 mg acetaminophen. mg • symb… Catalyst , A catalyst is any agent that functions to speed up a reaction or process without being used up or changed itself. In chemical reactions, molecules ar… Rf , Rf • symb. the chemical element rutherfordium. rf, rfz. = rinforzando. RF n. see rheumatic fever. RF See release factor. rf reef Cs (element) , caesium-137 (seez-iŭm) n. an artificial radioactive isotope of the metallic element caesium, used rarely in radiotherapy. Symbol: 137Cs. See also tel…
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