1. A small genus of cephalopodous molluscs, provided with membranous expansions, by which they sail.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• nauils,
• nautalius,
• nautilas,
• nauteous,
• nautilis,
• natulus,
• nautious,
• nautilaus,
• nautillus,
• tutilus,
• cautelus,
• nauplus,
• naulpius,
• nautilusse,
• nautilo,
• nautilii,
• nautili,
• atilius,
• sauginus,
• dactilus

The adjective form of the word "nautilus" is "nautiline".