a tern is a form of:

Tern



noun
1.
(a seabird with long pointed wings and a forked tail) សត្វបក្សីសមុទ្រ
ENGLISH MEANING
noun
1.
Any one of numerous species of long-winged aquatic birds, allied to the gulls, and belonging to Sterna and various allied genera.
adjective
1.
Threefold; triple; consisting of three; ternate.
2.
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.