alternate
adj//ɒlˈtɜː(ɹ).nət//omväxlande, alternerande, växlande, alternativ, varannan, ersättare, vikarie, alternera, följa, växla
Happening by turns; one following the other in succession of time or place; first one and then the other (repeatedly).
(mathematics) 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.
(US) A substitute; an alternative; one designated to take the place of another, if necessary, in performing some duty.
(transitive) To perform by turns, or in succession; to cause to succeed by turns; to interchange regularly.