Definitions for "Bound Water"
Bound water refers to moisture that is intimately associated with the finer wood elements of the cell wall by adsorption and held with sufficient force to reduce the vapour pressure. It is also known as adsorbed moisture or hygroscopic moisture. Bound water is chemically bonded to the cellulose molecules and energy is required to break that bond.
water found within the cell wall of wood.
water that is osmotically inactive (i.e., water bound in the structure of macromolecules, such as proteins)