Reproduction in distinctive patterns in alternate generations, as seen in the nonsexual (invertebrate) and the sexual (vertebrate) cycles of digenetic trematode parasites. [G. di-, two, + G. genesis, generation]
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di·gen·e·sis (')dī-'jen-ə-səs n, pl -e·ses -.sēz successive reproduction by sexual and asexual methods
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di·gen·e·sis (di-jenґə-sis) alternation of generations.Medical dictionary. 2011.