'Sperm oil' definitions:

Definition of 'sperm oil'

(from WordNet)
noun
An animal oil found in the blubber of the sperm whale

Definition of 'Sperm oil'

From: GCIDE
  • Sperm \Sperm\, n.[Contr. fr. spermaceti.] Spermaceti. [1913 Webster]
  • Sperm oil, a fatty oil found as a liquid, with spermaceti, in the head cavities of the sperm whale.
  • Sperm whale. (Zool.) See in the Vocabulary. [1913 Webster]