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n. 1. Nautical The triangular blade at the end of an arm of an anchor, designed to catch in the ground. 2. A barb or barbed head, as on an arrow or a harpoon. 3. Either of the two horizontally flattened divisions of the tail of a whale. [Possibly from FLUKE1.]  (click for a larger image) fluke2top: arrowhead and whale flukes bottom: anchor flukes |
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