The reciprocal succession of (normally two) things in time or place; the act of following and being followed by turns; alternate succession, performance, or occurrence

in an alternative way / (conjunctive) Used to link a pair of possibilities

present participle of alternate

That alternates. / (mathematics, of a knot) Having a planar diagram whose crossings alternate between "over" and "under" as one travels along the knot.

The state of being alternative or representing alternatives.

plural of alternative

A characteristic of something having alternative connotations, akin to the representation of choice between two or more possibilities.

(electrical engineering) An electric generator which produces alternating current through mechanical means.

plural of alternator

plural of alternant