A chemical group (CH3CO-) derived from acetic acid, commonly found in organic compounds and biochemical processes. An important functional group in chemistry.
From Latin 'acetum' (vinegar) + Greek suffix '-yl' (matter, substance). Coined in 19th century as organic chemistry developed systematic naming conventions.
The acetyl group is everywhere in your body - it's crucial for energy metabolism and is part of acetylcholine, a key neurotransmitter. Aspirin works by acetylating enzymes (adding acetyl groups), which is why it's technically called 'acetylsalicylic acid'.
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