subfamily Sterninae

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Noun1.subfamily Sterninae - terns
bird family - a family of warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
family Laridae, Laridae - gull family: gulls and terns
tern - small slender gull having narrow wings and a forked tail
genus Sterna, Sterna - a genus of Sterninae