noun
carboxy group
Technical term in organic chemistry; refers to the functional group -COOH.
カルボキシ基は有機酸に特徴的な官能基です。
The carboxy group is a functional group characteristic of organic acids.
カルボン酸 (carboxylic acid) is the compound class containing the carboxy group; カルボキシ基 is the functional group itself.
From English 'carboxy-' + 基 (group).