alternate
alternated
verb
1.
2.
adjective
(-nĭt)
1. Happening or following in turns; succeeding each other continuously: alternate seasons of the year. See Usage Note at alternative.
2. Designating or relating to every other one of a series: alternate lines.
3. Serving or used in place of another; substitute: an alternate plan.
4. Botany. a. Arranged singly at each node, as leaves or buds on a stem. b. Arranged regularly between other parts, as stamens between petals.
noun
Abbr. alt.
[Latin alternāre, alternāt-, from alternus, by turns, from alter, other.]
al