bullhead

noun

1. (Canada, US)any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
2. (Canada, US)any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
3. (Canada, US)any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
4. (Europe)Any of various sculpins of the suborder Scorpaenoidei
5. (Europe)The European bullhead, Cottus gobio.
6. (New-Zealand)A fish of species Gobiomorphus gobioides.
7. A bullhead shark (Heterodontus spp.).
8. (rare)An obstinate person.
9. A bullhead rail.
10. A chronograph (watch or stopwatch) with two push buttons arranged like the horns of a bull on the top end of the case, typically with the crown between them.