Definition of

Argonne

  1. (noun, act) an American operation in World War I (1918); American troops under Pershing drove back the German armies which were saved only by the armistice on November 11

via WordNet, Princeton University

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Word of the Moment

Synchronoscope

an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)