black whale

Noun

• large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergris

• small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the school

Related words

• Synonyms: 
  sperm whale , cachalot , Physeter catodon , pilot whale , common blackfish , blackfish , Globicephala melaena