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prototroch

noun
pro·​to·​troch | \ ˈprōtə‧ˌträk\
plural -s

Definition of prototroch 

: the ciliated band or ring characteristic of trochophore larvae

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Other Words from prototroch

prototrochal \ prōtä‧trəkəl \ adjective

History and Etymology for prototroch

prot- + -troch

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