Whale oil

Whale oil is oil obtained from the blubber of whales.^[1] Oil from the bowhead whale was sometimes known as train-oil, which comes from the Dutch word traan ("tear drop").

Sperm oil, a special kind of oil obtained from the head cavities of sperm whales, differs chemically from ordinary whale oil: it is composed mostly of liquid wax. Its properties and applications differ from those of regular whale oil, and it was sold for a higher price.