Source : Webster's Revised Unabridged Dictionary (1913)

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.