alternation of generation

Webster's Dictionary (GCIDE)

1.The reciprocal succession of 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. [1913 Webster]

2.(Math.) Permutation. [1913 Webster]

3.The response of the congregation speaking alternately with the minister. --Mason. [1913 Webster]

Alternation of generation. See under Generation. [1913 Webster]