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perisome

noun
peri·​some | \ ˈperəˌsōm\
variants: or less commonly perisoma \ ˌ⸗⸗ˈsōmə \
plural -s

Definition of perisome

: the body wall of an invertebrate especially : the body wall of an echinoderm

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History and Etymology for perisome

New Latin perisoma, from peri- + -soma

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