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单词 carboxyl group
释义

WordReference Random House Unabridged Dictionary of American English © 2024
carboxyl group′, 
  1. Chemistrythe univalent radical COOH, present in and characteristic of organic acids.
  • 1875–80

Collins Concise English Dictionary © HarperCollins Publishers::
carboxyl group, carboxyl radical /kɑːˈbɒksaɪl -sɪl/ n
  1. the monovalent group –COOH, consisting of a carbonyl group bound to a hydroxyl group: the functional group in organic acids
Etymology: 19th Century carboxyl, from carbo- + oxy-² + -yl
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