plural of dual school

(dated) A mixed-sex school.

A species of duck, Malacorhynchus membranaceus, endemic to Australia.

plural of blue duck

A species of duck, Hymenolaimus malacorhynchos, native to New Zealand.

(anatomy) Any of a branching system of ducts that carry milk from the lobules of the mammary gland to the nipple

(informal) The extinct flightless bird Bullockornis.

(Ireland, slang) A Dubliner.

(after a qualification) Abbreviation of University of Dublin, used especially following post-nominal letters indicating status as a graduate.

A surname.