alternate

/AO1 L T ER0 N AH0 T/
noun
  1. 1

    That which alternates with something else; vicissitude.

  2. 2

    A substitute; an alternative; one designated to take the place of another, if necessary, in performing some duty.

  3. 3

    A proportion derived from another proportion by interchanging the means.

  4. 4

    A replacement of equal or greater value or function.

  5. 5

    Figures or tinctures that succeed each other by turns.

verb
  1. 1

    To perform by turns, or in succession; to cause to succeed by turns; to interchange regularly.

  2. 2

    To happen, succeed, or act by turns; to follow reciprocally in place or time; followed by with.

    โ€œThe flood and ebb tides alternate with each other.โ€

  3. 3

    To vary by turns.

    โ€œThe land alternates between rocky hills and sandy plains.โ€

  4. 4

    To perform an alternation (removal of alternate vertices) on (a polytope or tessellation); to remove vertices (from a face or edge) as part of an alternation.

adjective
  1. 1

    Happening by turns; one following the other in succession of time or place; first one and then the other (repeatedly)

    โ€œalternate picking is a guitar playing techniqueโ€

  2. 2

    Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second.

    โ€œthe alternate members 1, 3, 5, 7, etc.โ€

  3. 3

    Other; alternative.

    โ€œHe lives in an alternate universe and an alternate reality.โ€

  4. 4

    (of leaves) Distributed singly at different heights of the stem, and at equal intervals as respects angular divergence.

    โ€œMany trees have alternate leaf arrangement (e.g. birch, oak and mulberry).โ€

Source: https://en.wiktionary.org/wiki/alternate