Definition of nautilus noun from the Oxford Advanced Learner's Dictionary

 

nautilus

 noun
noun
BrE BrE//ˈnɔːtɪləs//
 
; NAmE NAmE//ˈnɔːtɪləs//
 
Invertebrates
 
jump to other results
a creature with a shell that lives in the sea. It has tentacles around its mouth and its shell fills with gas to help it float. See related entries: Invertebrates Word Originmodern Latin, from Latin, from Greek nautilos, literally ‘sailor’.
See the Oxford Advanced American Dictionary entry: nautilus