Definition of octopus in English:

octopus

Line breaks: octo|pus
Pronunciation: /ˈɒktəpəs
 
/

noun (plural octopuses)

A cephalopod mollusc with eight sucker-bearing arms, a soft sac-like body, strong beak-like jaws, and no internal shell.
  • Order Octopoda, class Cephalopoda: Octopus and other genera
More example sentences
  • He compares the octopus to the other cephalopods - cuttlefish, crayfish, and the like.
  • The harbor seal's diet consists of fish, cephalopods, such as octopus and squid, and crustaceans.
  • Cephalopods, the octopus, the squid and cuttlefish are the main groups, I think.

Origin

mid 18th century: modern Latin, from Greek oktōpous (see Octopoda).

Usage

The standard plural in English of octopus is octopuses. However, the word octopus comes from Greek and the Greek plural form octopodes is still occasionally used. The plural form octopi, formed according to rules for some Latin plurals, is incorrect.

Derivatives

octopoid

adjective
More example sentences
  • What possible justification does this vast octopoid expanse have, other than the exercise of American power?
  • Wolugo was motionless, except for a faint movement of the fleshy flaps deep within the recesses of her mantle cavity, back of the octopoid head.
  • The Oluas were a bizarre octopoid race with Squid heads and tall grey bodies.

Definition of octopus in:

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