Vertical Tabs DefinitionA carbohydrate is an organic compound that is made up of the elements carbon, hydrogen, and oxygen. It is what many animals and plants use for fuel. In a sentenceWe eat carbohydrates when we snack on a candybar or munch on an apple. Synonyms & AntonymsSynonyms: None Antonyms: None Word factsCarbo- means carbon Hydrate- means water, which is made up of hydrogen and oxygen