FLYBOAT

flyboat. Flyboat, n. a large flat bottomed Dutch vessel

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Fly″boat′ (?), n. [[Fly + boat: cf. D. vlieboot.]] 1. 1. (Naut.) A large Dutch coasting vessel.
Captain George Weymouth made a voyage of discovery to the northwest with two flyboats. Purchas. 2. 2. A kind of passenger boat formerly used on canals.