carbohydrate: 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
chemical: material produced by or used in a reaction involving changes in atoms or molecules
fibroadenoma: benign and movable and firm and not tender tumor of the breast; common in young women and caused by high levels of estrogen