Terns are seabirds in the family Sternidae, previously considered a subfamily (Sterninae) of the gull family Laridae (van Tuinen et al., 2004). They form a lineage with the gulls and skimmers which in turn is related to skuas and auks. Terns have a worldwide distribution.
That which consists of, or pertains to, three things or numbers together; especially, a prize in a lottery resulting from the favorable combination of three numbers in the drawing; also, the three numbers themselves.