Hesperornithiformes
(redirected from Hesperornithes)Also found in: Wikipedia.
Hesperornithiformes
[‚hes·pə‚rȯr‚nith·ə′fȯr‚mēz] (paleontology)
An order of ancient extinct birds; individuals were large, flightless, aquatic diving birds with the shoulder girdle and wings much reduced and the legs specialized for strong swimming.