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trematode worm

trematode wormtrematode worm
  1. Tadpole-shaped parasitic larva of a trematode worm ; tail disappears in adult stage .

    烃源岩已进入成熟阶段,处于生油高峰期。蝌蚪形的吸虫类寄生幼虫;成体阶段尾巴消失。