thimbleeye noun2 •A loop at the end of a rope that is protected from chafing by a thimble (metal ring).Each end of the runner has a thimble-eye splice , with a strong hook at the end of the standing part. — 1878 •An Atlantic chub mackerel (Scomber colias).July 25, 1887, the schooner Peter Cooper caught 6000 thimbleeye mackerel off Manasquan N. J. — 1904 formsthimbleeyes
