Noun
an animal oil found in the blubber of the sperm whale
Source: WordNetCooled sperm oil congeals and must be squeezed back into liquid state; blubber is boiled in the try-pots on deck; the warm oil is decanted into casks, and then stowed in the ship. Source: Internet
The Pequod gams next with the Bachelor, a Nantucket ship heading home full of sperm oil. Source: Internet