Definition of placobranchoid in English:

placobranchoid

adjective

Zoology
rare
  • Of, relating to, or designating members of the molluscan superfamily Placobranchoidea (also called Elysioidea, and included in the order Sacoglossa), comprising slug-like marine opisthobranch gastropods having plate-like gills covering the upper surface of the mantle.

noun

Zoology
rare
  • A mollusc of the superfamily Placobranchoidea.

Origin

Late 19th century; earliest use found in Isaac Funk (1839–1912), publisher and reformer. From scientific Latin Placobranchus + -oid. In later use after scientific Latin Placobranchoidea, superfamily name.

Pronunciation

placobranchoid

/ˌplakə(ʊ)ˈbraŋkɔɪd/