pros·o·branch
| \ ˈprä-sə-ˌbraŋk
\
\
plural prosobranchs
Definition of prosobranch
: any of a subclass (Prosobranchia) of gastropod mollusks that have the loop of visceral nerves twisted into a figure eight, the sexes usually separate, and usually an operculum
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“Prosobranch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/prosobranch. Accessed 18 Apr. 2021.
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The first known use of prosobranch was in 1851
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