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Two spheres of iron or other heavy material, connected by a short bar for a handle; used as a weight for swinging in the hands.

Dumb-bells

Two spheres of iron or other heavy material, connected by a short bar for a handle; used as a weight…

"Halteres were certain masses of stone or metal, which were used in the gymnastic exercises of the Greeks and Romans. Persons who practised leaping frequently performed their exercises with halteres in both hands; but they were also frequently used merely to exercise the body in somewhat the same manner as out dumb-bells." — Smith, 1873

Halteres

"Halteres were certain masses of stone or metal, which were used in the gymnastic exercises of the Greeks…