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



BrE BrE//ˈnɔːtɪləs//
; NAmE NAmE//ˈnɔːtɪləs//
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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