The term 'saltiness' is related to the term 'SALINITY', which is a measure of the amount of salt dissolved in a given volume of water. SALINITY is typically measured in parts per thousand (ppt) and can vary depending on the environment. Saltiness is often used to describe the taste of food, and is usually associated with salty foods such as chips or pretzels. Saltiness can also be used to describe the flavor of certain beverages, such as beer or soda. In general, saltiness is a measure of how salty something tastes, and is often used to describe the flavor of food and drinks.