sphenisciform seabird


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Noun1.sphenisciform seabird - flightless cold-water seabirds: penguinssphenisciform seabird - flightless cold-water seabirds: penguins
sea bird, seabird, seafowl - a bird that frequents coastal waters and the open ocean: gulls; pelicans; gannets; cormorants; albatrosses; petrels; etc.
penguin - short-legged flightless birds of cold southern especially Antarctic regions having webbed feet and wings modified as flippers