Voltaic-pile definitions

A source of electricity consisting of a number of alternating disks of two different metals separated by absorbent material moistened with an electrolyte, forming primary cells connected in series.
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An early type of primary cell used to generate direct current: it consisted of a stack of paired disks of dissimilar metals separated by acid-saturated cloth or paper.
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A source of electricity consisting of a number of disks that alternate between two different metals and are separated by acid-moistened pads, forming a set of galvanic cells connected in series.
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