Definition of carboxyl
: a monovalent functional group or radical −COOH typical of organic acids —called also carboxyl group
carboxylicplay \ˌkär-(ˌ)bäk-ˈsi-lik\ adjective
Origin and Etymology of carboxyl
International Scientific Vocabulary
First Known Use: 1869
Seen and Heard
What made you want to look up carboxyl? Please tell us where you read or heard it (including the quote, if possible).