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Cephalopoda British & World English

A large class of active predatory molluscs comprising octopuses, squids, and cuttlefish. They have a distinct head with large eyes and a ring of tentacles around a beaked mouth, and are able to release a cloud of inky fluid to confuse predators

Cephalopoda in ammonoid British & World English

An extinct cephalopod mollusc with a flat-coiled spiral shell, found commonly as a fossil in marine deposits from the Devonian to the Cretaceous periods

Cephalopoda in belemnite British & World English

An extinct cephalopod mollusc with a bullet-shaped internal shell that is typically found as a fossil in marine deposits of the Jurassic and Cretaceous periods

Cephalopoda in cephalopod British & World English

An active predatory mollusc of the large class Cephalopoda, such as an octopus or squid

Cephalopoda in cuttlefish British & World English

A swimming marine mollusc that resembles a broad-bodied squid, having eight arms and two long tentacles that are used for grabbing prey. Its internal skeleton is the familiar cuttlebone, which it uses for adjusting buoyancy

Cephalopoda in mollusc British & World English

An invertebrate of a large phylum which includes snails, slugs, mussels, and octopuses. They have a soft unsegmented body and live in aquatic or damp habitats, and most kinds have an external calcareous shell

Cephalopoda in nautiloid British & World English

A mollusc of a group of mainly extinct marine molluscs which includes the pearly nautilus

Cephalopoda in octopus British & World English

A cephalopod mollusc with eight sucker-bearing arms, a soft sac-like body, strong beak-like jaws, and no internal shell

Cephalopoda in squid British & World English

An elongated, fast-swimming cephalopod mollusc with eight arms and two long tentacles, typically able to change colour