Definition of pleurotomarioid in English:

pleurotomarioid

Pronunciation /ˌplʊərəʊtə(ʊ)ˈmɛːrɪɔɪd/ /ˌplɔːrəʊtə(ʊ)ˈmɛːrɪɔɪd/

noun

rare Zoology
  • A prosobranch gastropod mollusc of the family Pleurotomariidae or the superfamily Pleurotomarioidea.

Origin

Late 19th century (in an earlier sense). From scientific Latin Pleurotomaria + -oid.