1. carbohydrate

noun. ['ˌkɑːrboʊˈhaɪˌdreɪt, ˌkɑːrboʊˈhaɪdrət'] an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain.