Definition

1. Noun:
   • A cephalopod mollusk of warm seas whose females have delicate papery spiral shells: The "paper nautilus" is a pelagic octopus of the genus Argonauta. It is not a true nautilus. The female secretes a thin, white, chambered shell used as a brood chamber for eggs. The male is much smaller and lacks a shell.

Usage Examples

• Noun:
  • We observed a female paper nautilus drifting near the surface of the tropical ocean.
  • The delicate, translucent shell of the paper nautilus often washes ashore after storms.

Advanced Usage

• The term is often used in marine biology and zoology contexts to distinguish this animal from the true, chambered nautilus ().
  • The paper nautilus, or argonaut, is an example of convergent evolution with the pearly nautilus.

Variants and Related Words

• Argonaut (n): A direct synonym and the scientific common name for the paper nautilus.
  • The argonaut is a fascinating example of a shelled octopus.
• Argonauta (n): The genus name for these mollusks.
  • The species Argonauta argo is a well-known type of paper nautilus.

Synonyms

• Argonaut: The most common direct synonym.
• Pelagic octopus: A descriptive term highlighting its biology and habitat.

Notes on Meaning

• It is critical to distinguish the "paper nautilus" from the "chambered nautilus" or simply "nautilus." They are different animals from different taxonomic orders. The "paper" in the name refers specifically to the fragile, parchment-like quality of the female's shell.

Noun

1. cephalopod mollusk of warm seas whose females have delicate papery spiral shells