■ noun Biology a pattern of reproduction shown by some lower plants and invertebrates, involving a regular alternation between sexual and asexual forms (as in ferns) or dioecious and parthenogenetic forms (as in some jellyfishes).
ALTERNATION OF GENERATIONS
Meaning of ALTERNATION OF GENERATIONS in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004