Alternating series

a series, usually infinite, in which successive terms have opposite signs, as 1 − ½ + ¼ − ⅛ +. ….
Historical Examples

They use a piece of quartz or glass, making horizontal and vertical incisions in alternating series.
Oriental Women Edward Bagby Pollard

The area is thus an alternating series of three wooded slopes and two grass-covered, relatively level areas.
Home Range and Movements of the Eastern Cottontail in Kansas Donald W. Janes


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    alternating tremor alternating tremor n. Hyperkinesia characterized by regular, symmetrical, to-and-fro movements produced by patterned, alternating contraction of muscles and their antagonists.

  • Alternating voltage

    a voltage that reverses direction in regular cycles. Historical Examples I want to wait until you have seen what the crystal does when an alternating voltage is applied to it. Letters of a Radio-Engineer to His Son John Mills

  • Alternating-gradient focusing

    noun (physics) a method of focusing beams of charged particles in high-energy accelerators, in which a series of magnetic or electrostatic lenses alternately converge and diverge the beam, producing a net focusing effect and thus preventing the beam from spreading

  • Alternatingly

    to interchange repeatedly and regularly with one another in time or place; rotate (usually followed by with): Day alternates with night. to change back and forth between conditions, states, actions, etc.: He alternates between hope and despair. to take turns: My sister and I alternated in doing the dishes. Electricity. to reverse direction or sign […]

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