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Ketone

/kˈitoʊn/
B2
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(noun) A homologous series of organic molecules whose functional group is an oxygen atom joined to a carbon atom—by a double bond—in a carbon-hydrogen based molecule.

The doctor checked her ketone levels.
Ketone bodies are produced by the liver.
CEFR Practice Quiz
The presence of a ____ in the urine can be a sign that the body is burning fat for its energy instead.

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