Definition of "nautiloid"

nautiloid

noun
plural nautiloids
1. A mollusc resembling a nautilus; specifically, a cephalopod of the subclass Nautiloidea.
  Quotations
  Cephalopods have a long fossil record, the earliest certain cephalopod fossils are loosely coiled or straight shelled nautiloids found in the Cambrian of China 515 million years ago.
  2016 August 17, Mark Carnall, The Guardian‎
adjective
comparative more nautiloid, superlative most nautiloid
1. (zoology) Resembling a nautilus; pertaining to the subclass Nautiloidea.