Drainage basin: The area drained by a river and its tributaries. A drainage basin is considered to be an open system because water can be added or lost from a drainage basin.
Noun. 1. milk whey-the serum or watery part of milk that is separated from the curd in making cheese. whey. blood serum, serum-an amber, watery fluid, rich in proteins, that separates out when blood coagulates. 1  Facebook. 2  Twitter.
The protein in whey is one of the two main proteins in milk, the other is a protein called casein. (When an acidic substance such as vinegar is mixed into milk, these two proteins will separate -- the casein proteins glob together to form solids called curds, leaving the whey as a liquid.).ike all proteins, whey protein is made of building blocks called amino acids. Protein in the body is primarily used for muscle growth and to repair tissues. When people digest food, they break down the proteins into amino acids, and then use those amino acids to build new proteins.