black whale

Noun (2)

1. small dark-colored whale of the Atlantic coast of the United States; the largest male acts as pilot or leader for the schoolSynonyms: pilot whaleblack whalecommon blackfishblackfishGlobicephala melaena
2. large whale with a large cavity in the head containing spermaceti and oil; also a source of ambergrisSynonyms: sperm whalecachalotblack whalePhyseter catodon