nautiloid

 
Pronunciation: /ˈnɔːtɪlɔɪd/

noun

Zoology
  • a mollusc of a group of mainly extinct marine molluscs which includes the pearly nautilus.
    • Subclass Nautiloidea, class Cephalopoda: Nautilus is the only surviving genus

Origin:

mid 19th century: from the modern Latin genus name Nautilus (see nautilus)