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.
Whey Protein Concentrate. Whey is the residual liquid substance that is obtained by separating the coagulum from milk during cheesemaking. There are important components contained in whey, the most valued of which are the proteins which are highly regarded for their nutritional properties.