bullhead

noun11

1. •
   (US, Canada) any of a variety of related species of generally dark-colored catfish in the family Ictaluridae.
2. •
   (US, Canada) The black bullhead, Ameiurus melas.
3. •
   (US, Canada) The brown bullhead, Ameiurus nebulosus.
4. •
   (US, Canada) The yellow bullhead, Ameiurus natalis.
5. •
   Any of various sculpins of the suborder Scorpaenoidei
6. •
   The European bullhead, Cottus gobio.
7. •
   A bullhead shark (Heterodontus spp.).
8. •
   A bullhead rail.
9. •
   (rare) An obstinate person.
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.
11. •
    (New-Zealand) A fish of species Gobiomorphus gobioides.