| 单词 | Acoelomata | 
| 释义 | Acoelomataplural noun  Acoe·lo·ma·ta   ¦ā-sē-ˈlō-mə-tə  in some classifications    : the Metazoa lacking a true body cavity regarded as a natural group (1) including the sponges and coelenterates and often the lower worms or (2) including only certain worms   | 
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