| acetyl | (noun) the organic group of acetic acid (CH3CO-) | Synonyms: acetyl group, acetyl radical, ethanoyl group, ethanoyl radical |
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| acetylation | (noun) the process of introducing an acetyl group into a compound | - |
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| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| acetylene | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: alkyne, ethyne |
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| diacetylmorphine | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: heroin |
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| oxyacetylene | (noun) a mixture of oxygen and acetylene; used to create high temperatures for cutting or welding metals | - |
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