Meaning

noun small slender gull having narrow wings and a forked tail

originPIE word *tréyes The noun is derived from Late Middle English terne (“throw of a die or dice showing the number three”), from Old French terne (“gathering of three people; trinity”) (modern French terne), from Latin ternās, the accusative feminine plural of ternī (“three each; three at a time”), from ter (“thrice”) (ultimately from Proto-Indo-European *tréyes (“three”)) + -ī (from -us (suffix…

Etymology from Wiktionary, CC BY-SA 3.0