say it: NAW-tuh-luhs
nautilus is a noun meaning "a submarine that is propelled by nuclear power". It carries 3 recorded senses.
a submarine that is propelled by nuclear power
cephalopod mollusk of warm seas whose females have delicate papery spiral shells
cephalopod of the Indian and Pacific oceans having a spiral shell with pale pearly partitions
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for nautilus come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.