nautiloid(redirected from Nautiloidea)
Also found in: Dictionary, Encyclopedia.
Related to Nautiloidea: Nautiloids
nautiloidany mollusc of the subclass Nautiloidea, a group of cephalopods related to the fossil ammonites, which produce a large spiral chambered shell, in the last chamber of which the animal lives.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005