- 1(informal carb) [countable, uncountable] a substance such as sugar or starch that consists of carbon, hydrogen, and oxygen. Carbohydrates in food provide the body with energy and heat.
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- 2carbohydrates (informal carbs) [plural] foods such as bread, potatoes, and rice that contain a lot of carbohydrates I'm trying to cut down on carbohydrates. see low-carb
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