Acoelomata

plural 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

Word History

Etymology

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

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