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dreadnought (n.)

literally "one who or that which fears nothing," from dread (v.) + nought (n.). As a synonym for "battleship" (1916) it is from a specific ship's name. Dreadnought is mentioned as the name of a ship in the Royal Navy as early as c. 1596, but the modern generic sense is from the name of the first of a new class of British battleships, based on the "all big-gun" principle (armed with 10 big guns rather than 4 large guns and a battery of smaller ones), launched Feb. 18, 1906.

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