What does decarboxylate mean?
To decarboxylate is to strip a carboxyl group — a carbon atom double-bonded to oxygen and single-bonded to a hydroxyl (–COOH) — from a molecule, a process that typically releases carbon dioxide as a by-product. It is a cornerstone reaction in organic chemistry and biochemistry: enzymes called decarboxylases carry out decarboxylation constantly inside living cells, converting pyruvate to acetaldehyde in fermentation and helping synthesize neurotransmitters such as serotonin and GABA. The word also appears far outside the lab. Bakers rely on decarboxylation during the Maillard reaction that browns bread crusts, brewers encounter it in hop chemistry, and it became a household term among cannabis users, since heating the plant material converts inactive THCA into psychoactive THC. Decarboxylate is almost always a verb of formal register, appearing chiefly in textbooks, research papers, and technical food-writing rather than everyday conversation.
verbTo remove a carboxyl group (–COOH) from a chemical compound, typically releasing carbon dioxide in the process.
- (chemistry, transitive) To remove a carboxyl group from a compound, usually with the release of carbon dioxide.
- (chemistry, intransitive) To undergo loss of a carboxyl group.
"Bakers know that the Maillard reaction begins to decarboxylate amino acids at the crust's surface."
"The enzyme decarboxylates glutamic acid to produce GABA."
"Aspirin can slowly decarboxylate when stored in hot, humid conditions."
Raw cannabis won't get you high until heat decarboxylates its THCA into THC — which is why edibles start with an oven, not a grinder.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of decarboxylate
Decarboxylate is built transparently from Latin and Greek roots: the prefix de- (Latin, 'removal'), carboxyl (a blend coined from 'carbonyl' and 'hydroxyl', ultimately from Latin carbo, 'coal' or 'charbon'), and the verbal suffix -ate from Latin -atus. The term arose in late nineteenth- and early twentieth-century organic chemistry, alongside the coinage of carboxyl itself, as chemists systematized the nomenclature of functional groups and their reactions. Its cognates are essentially its own building blocks — carbon, carbonate, carbonyl, hydroxyl — all descending from the same Latin root for charcoal.
Related word forms
How decarboxylate is actually used
Strictly a technical term used in chemistry, biochemistry, and food science; rare outside scientific writing. In laboratory and culinary contexts it is most often used transitively, though passive constructions ('the compound was decarboxylated') are equally common.
Easily confused with decarboxylate
Decarbonate means to remove dissolved carbon dioxide from a liquid such as sparkling water, while decarboxylate specifically removes a carboxyl group (–COOH) from an organic molecule.