A device or substance that causes something to explode; a detonator or a person who causes explosions.
From 'explode' (Latin 'explodere') + agent suffix '-er' (one who/that which). Creates a noun for the thing or person causing explosion.
In mining history, the 'powder monkey'—a child who carried explosives—was different from the 'exploder,' the skilled adult who actually set charges and detonated them.
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