This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Any salt or ester of a carboxylic acid.

v. To form a carboxyl group by introduction of carbon dioxide

v. To react with a carboxylic acid

v. to treat a chemical compound with carboxyl or carboxylic acid.

v. treat (a chemical compound) with carboxyl or carboxylic acid

"The restaurant is dedicated to the concept of umami, the savory, meaty "fifth taste" that may be technically defined as the carboxylate anion of glutamic acid, which is to say the dash of soy sauce in your stir-fry or the catsup you like with your fries."

process    treat   

monatomic    ethoxide    superoxide    enolate    halide    electron    hydroxyl    pentathol    oleate    diazonium