Alternation

Noun

 * 1) 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; as, the  alternation of day and night, cold and heat, summer and  winter, hope and fear.
 * 2) The response of the congregation speaking alternately with the minister.
 * 3)  ablaut
 * 4)  The "inclusive or" truth function.
 * 5)  A sequence that alternates between positive and negative values. (Sometimes wrongly used to mean a permutation.)

Adjectives for Alternation
mad; periodical; endless; rapid; unconscious; intermittent; infinite.

Thesaurus
Lissajous figure; back-and-forth; battledore and shuttlecock; beat; chain; coaction; coming and going; commutation; complementary distribution; concurrence; consecution; cooperation; counterchange; cross fire; cyclicalness; ebb and flow; engagement; exchange; fluctuation; flux and reflux; give-and-take; interaction; interchange; intercommunication; intercourse; interlacing; intermeshing; intermittence; intermittency; intermutation; interplay; intertwining; interweaving; interworking; lex talionis; measure for measure; mesh; meshing; meter; mutual admiration; mutual support; mutual transfer; mutuality; order; oscillation; pendulation; pendulum motion; periodicalness; periodicity; permutation; piston motion; progression; pulsation; quid pro quo; reappearance; reciprocality; reciprocation; reciprocity; recurrence; regular wave motion; reoccurrence; repetition; retaliation; return; reversion; rhythm; rhythmic play; rotation; row; seasonality; seesaw; seesawing; sequel; sequence; series; shifting; shuffling; sine wave; something for something; succession; teeter; teeter-totter; teeter-tottering; teetering; tit for tat; to-and-fro; tottering; train; transposal; transposition; undulation; ups and downs; vacillation; variation; vicissitude; wavering; wigwag

Etymology
alternatio:; compare with alternation:.

Translations

 * Bulgarian: редуване,
 * Croatian:


 * Esperanto:
 * Spanish: alternancia, rotación