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The Collaborative International Dictionary
Frigatoon

Frigatoon \Frig"a*toon`\, n. [It. fregatone: cf. F.fr['e]gaton. See Frigate.] (Naut.) A Venetian vessel, with a square stern, having only a mainmast, jigger mast, and bowsprit; also a sloop of war ship-rigged.

Wiktionary
frigatoon

n. (context nautical English) A Venetian vessel with a square stern, having only a mainmast, jigger mast, and bowsprit; also a sloop of war ship-rigged.