Definition of pluteus in English:

pluteus

noun

Zoology
  • The planktonic larva of some echinoderms, being somewhat triangular with lateral projections.

    • ‘Another striking example of metamorphosis is the transformation of the pluteus stage larva of the sea urchin into the adult.’
    • ‘Brittle stars also have pluteus larvae with skeletal spicules that resemble those of the urchin.’

Origin

Late 19th century: from Latin, literally ‘barrier’ (with reference to its shape).

Pronunciation

pluteus

/ˈpluːtɪəs/