carboxyl

[kahr-bok-sil] /kɑrˈbɒk sɪl/
adjective
1.
containing the carboxyl group.
Origin
1865-70; carb- + ox(ygen) + -yl
Related forms
carboxylic, adjective
carboxyl in Medicine

carboxyl car·box·yl (kär-bŏk'səl)
n.
The univalent radical, COOH, characteristic of all organic acids.

carboxyl in Science
carboxyl
  (kär-bŏk'səl)   
The radical COOH, characteristic of all carboxylic acids.