Source : Webster's Revised Unabridged Dictionary (1913)

Nautiloid \Nau"ti*loid\, a. [Nautilus + -oid: cf. F.
   nautilo["i]de.] (Zo["o]l.)
   Like or pertaining to the nautilus; shaped like a nautilus
   shell. -- n. A mollusk, or shell, of the genus Nautilus or
   family {Nautilid[ae]}.