noun🔗ShareNautiloideosA mollusc resembling a nautilus; specifically, a cephalopod of the subclass Nautiloidea."While exploring the museum's paleontology exhibit, the children were fascinated by the ancient fossils of nautiloids, ancestors of the modern nautilus. "Mientras exploraban la exhibición de paleontología del museo, los niños quedaron fascinados por los fósiles antiguos de nautiloideos, antepasados del nautilus moderno.animalbiologyoceannauticalChat with AIVocabulary GamePractice Reading