[ˈpluːtɪəs], (Noun)

Definitions:
- the planktonic larva of some echinoderms, being somewhat triangular with lateral projections


Phrases:

Origin:
early 17th century (denoting a wooden frame used to protect soldiers during a siege): from Latin, ‘barrier, screen’. The zoology sense dates from the 19th century and is from the modern Latin genus name, so called with reference to its shape