the act or process of alternating or causing to alternate
alternation
noun(al-ter-na-tion)
alternating occurrence : succession
alternation
noun(al-ter-na-tion)
inclusive disjunction
alternation
noun phrase(al-ter-na-tion)
the occurrence of two or more forms differently produced in the life cycle of a plant or animal usually involving the regular alternation of a sexual with an asexual generation