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 is a component of milk protein, with the other being casein. Whey may be healthier than other forms of protein. The benefits of whey are due to the protein itself, while casein may be a better muscle builder. This page features 270 unique references to scientific papers.