carboxylate /kɑɹˈbɑksɪleɪ̯t/verb 2noun 1forms 3 verb2 •To form a carboxyl group by introduction of carbon dioxide •To react with a carboxylic acid noun1 •Any salt or ester of a carboxylic acid.[…] substitution of a carboxylate would be expected to destabilize the dritterionic mesomer that contributes to the singlet valence bond description as the benzyne geometry becomes more bicyclic. — 2003 formscarboxylated · carboxylating · carboxylates