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Definitions of dogvane:
noun: (nautical) A small vane of bunting, feathers, or other light material, fastened to the end of a short staff and placed on the weather gunwale of a sailing ship to assist the helmsman to judge the direction of the wind.
noun: (obsolete, nautical) A cockade worn on a hat (worn in the British Navy in the 18th and 19th centuries)