dipleurula

noun
di·​pleu·​ru·​la | \dīˈplu̇r(y)ələ\
plural dipleurulas\ -​ləz \ or dipleurulae\ -​ˌlē \

Definition of dipleurula 

1 : a hypothetical bilaterally symmetrical echinoderm larva sometimes regarded as a common ancestor of echinoderms and chordates

2 : a larval echinoderm (such as a bipinnaria or an echinopluteus) not used technically

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History and Etymology for dipleurula

New Latin, from dipleura bilaterally symmetrical organisms (from di- + -pleura) + -ula

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