alterner[Français]

adjectif satellite
1 : every second one of a series; "the cleaning lady comes on alternate Wednesdays"; "jam every other day"- the White Queen
2 : serving or used in place of another; "an alternative plan"
verbe
1 : do something in turns
adjectif
1 : of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired