nautilus
Could not find nai in Logeion dictionaries.
nai Noun: masculine nominative plural, Noun: masculine vocative plural, Noun: masculine genitive singular of nautilus
nautĭlus or nautĭlŏs, i, m., = ναυτίλος,
- the nautilus, a shell-fish so called because it sails like a vessel, Plin. 9, 29, 47, § 88; cf. nauplius and naviger.
nautilus, ī, m. (ναυτίλος), das Schiffsboot, die Schiffskuttel, eine Art Schaltiere, die mit ihrer Schale gleich einem Schiffe segeln, Plin. 9, 88.
nautĭlus, ī, m. (ναυτίλος), nautile ou argonaute [mollusque] : Plin. 9, 88.