In chemistry, a group of atoms derived from a carboxylic acid by removing the hydroxyl group, commonly found in organic compounds.
Short for 'acetyl' or from German 'Acyl,' the term was coined to describe this functional group in chemistry. It's a shorthand that became standard in chemical nomenclature during the 20th century.
Acyl groups are like chemical building blocks that appear everywhere—in aspirin, in acetylcholine (your brain's messenger molecule), and in DNA modifications. This tiny group has huge biological consequences!
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