plural noun Acoe·lo·ma·ta \¦ā-sē-ˈlō-mə-tə\

Definition of Acoelomata

in some classifications

  1. :  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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Origin and Etymology of acoelomata

New Latin, from 2a- + coeloma + -ata

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