bullhead

noun

Etymology: From bull + head.

1. any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
2. any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
3. any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
4. Any of various sculpins of the suborder Scorpaenoidei
5. The European bullhead, Cottus gobio.
6. A fish of species Gobiomorphus gobioides.
7. A bullhead shark (Heterodontus spp.).
8. 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.