
1) Like some mollusks 2) Living fossil
Found on
https://www.crosswordclues.com/clue/nautiloid

Nautiloids are a large and diverse group of marine cephalopods (Mollusca) belonging to the subclass Nautiloidea that began in the Late Cambrian and are represented today by the living Nautilus and Allonautilus. Nautiloids flourished during the early Paleozoic era, where they constituted the main predatory animals, and developed an extraordinary di...
Found on
http://en.wikipedia.org/wiki/Nautiloid

• (a.) Like or pertaining to the nautilus; shaped like a nautilus shell. • (n.) A mollusk, or shell, of the genus Nautilus or family Nautilidae. • (n.) A mollusk, or shell, of the genus Nautilus or family Nautilidae. • (a.) Like or pertaining to the nautilus; shaped like a nautilus shell.
Found on
http://thinkexist.com/dictionary/meaning/nautiloid/

(from the article `cephalopod`) ...jaws (or beak); body usually somewhat streamlined; eyes highly developed, most closely resembling in acuity those of some vertebrates; about 650 ... ...became extinct at the end of the Permian), rugose corals, and sponges. The pelagic, or water column, environment was inhabited by a profusion of ... ...
Found on
http://www.britannica.com/eb/a-z/n/19

<zoology> Like or pertaining to the nautilus; shaped like a nautilus shell. ... <marine biology> A mollusk, or shell, of the genus Nautilus or family Nautilidae. ... Origin: Nautilus: cf. F. Nautiloide. ... (19 Mar 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
Nau'ti·loid adjective [
Nautilus +
-oid : confer French
nautiloïde .]
(Zoology) Like or pertaining to the nautilus; shaped like a nautilus shell. --
noun A mollusk, or shell, of the genus Nautilus or family
Nautilidæ .
Found on
http://www.encyclo.co.uk/webster/N/7
No exact match found.