A marine mollusc, of the family (taxlink) native to the Ocean and Ocean, which has tentacles and a spiral shell with a series of air-filled chambers, of which (taxlink) is the type genus.
{{quote-text|en|year=1956|author=Arthur C. Clarke|title=The City and the Stars|page=44
A kind of bell that sinks or rises by means of air.
nautilus, argonaut (genus ''Argonauta'')
(alternative form of)