unreasonably stubborn.

(Canada, US) The black bullhead, Ameiurus melas. / (Canada, US) The brown bullhead, Ameiurus nebulosus. / (Canada, US) The yellow bullhead, Ameiurus natalis.

plural of bullhead

(rail transport) A rail, most commonly used in the United Kingdom, with a head and foot nearly equal in cross-section, that is supported in cast iron chairs and secured by wedges or keys.

plural of alpine bullhead

A species of fish in the Cottidae family, Cottus poecilopus.

A European species in the Cottidae family, Cottus gobio.

plural of European bullhead

plural of bullhead rail

Nuphar variegata, native to Canada and the northern United States.