noun
: any of several very small short-tailed terns with largely dark gray or black plumage that breed in marshes and constitute a genus ( Chlidonias ) of nearly cosmopolitan distribution
noun
: any of several very small short-tailed terns with largely dark gray or black plumage that breed in marshes and constitute a genus ( Chlidonias ) of nearly cosmopolitan distribution
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012