*bottlehead*

n. (Zool.) A cetacean allied to the grampus; -- called also bottle-nosed whale. [ 1913 Webster ]

☞ There are several species so named, as the pilot whales, of the genus Globicephalus, and one or more species of Hyperoödon (Hyperoödon bidens, etc.), found on the European coast. See Blackfish, 1. [ 1913 Webster ]