单词	nautilus
释义	nau·ti·lus \ˈnȯ]d.ələs, ˈnä], ]təl-\ noun Etymology: New Latin, from Latin, paper nautilus, from Greek nautilos, literally, sailor, from naus ship — more at nave 1.  a. plural nautilus·es \-ələsə̇z\ or nauti·li \-əlˌī\ : any of several cephalopod mollusks of the southern Pacific and Indian oceans that constitute a genus (Nautilus), that are contained in the outermost chamber of a spiral chambered shell with an outer porcelaneous layer and an inner pearly layer, and that have numerous small tentacles arranged in groups and without suckers or hooks, no ink sac, four gills, four auricles, four nephridia, and a siphon consisting of two lobes not fused to form a tube — called also chambered nautilus, pearly nautilus  b. capitalized : the type genus and sole recent representative of the family Nautilidae comprising nautiluses and extinct related forms of which some date back to the Tertiary 2. [Latin] : paper nautilus
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