ketone

/ˈkiːtoʊn/
noun
  1. A type of organic chemical compound that has a carbonyl group (C=O) bonded to two carbon atoms.
    • The chemistry teacher explained how to name ketones using the suffix '-one'.
    • Acetone is the simplest and most well-known ketone.
    • Ketones are often used as solvents in nail polish removers and paints.
  2. A substance produced by the liver when the body breaks down fat for energy, especially during fasting or a low-carb diet.
    • When you fast, your body produces ketones to fuel your brain.
    • The athlete tested her urine for ketones to see if she was in fat-burning mode.
    • High levels of ketones in the blood can be a sign of diabetic ketoacidosis.
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