Definition of octopus in English:

octopus

noun

  • A cephalopod mollusk with eight sucker-bearing arms, a soft saclike body, strong beaklike jaws, and no internal shell.

    • ‘This fish is vital to the reef ecosystem as a predator of smaller fish, lobster, crab, octopus, and shrimp.’
    • ‘In addition, the octopus can inject a powerful neurotoxin that is stored in the salivary glands to disable or kill its prey.’
    • ‘The major group of mesozoans, the Dicyemida, live as microscopic parasites in the renal organs of squid and octopuses.’
    • ‘The task of retrieving the prey proved too simple for the octopus, so it was given a jar of fish with a screw-cap lid.’
    • ‘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.’
    • ‘Giant cephalopods such as squid and octopuses are also a great source of sea-monster folklore.’
    • ‘With more than a 250 species, octopuses are members of an ancient group of animals called cephalopods.’
    • ‘The olives were too strong, and the octopus too hesitant.’
    • ‘Abalone belongs to the phylum Mollusca, a group which includes clams, scallops, sea slugs, octopuses, and squid.’
    • ‘Cephalopods, the octopus, the squid and cuttlefish are the main groups, I think.’
    • ‘Cephalopods, which includes octopuses and squid, have seriously weird brains.’
    • ‘Otters also are known to eat crabs, octopus, squid, sea stars, and fish.’
    • ‘What are the implications of the physical properties of water for suction attachment in octopus suckers?’
    • ‘The circulatory systems of other vertebrates, as well as those of squids and octopuses, employ similar rubbery materials.’
    • ‘Indeed, octopuses are frequently observed to exert force on objects with their arms aligned parallel to the line of force.’
    • ‘A nautilus does not have suckers on its tentacles like an octopus does.’
    • ‘The most obvious example is the mantle, a spherical bag of hydrostat in an octopus and a cylinder closed at one end in a squid.’
    • ‘They eat a wide range of prey, often octopus and small molluscs.’
    • ‘Local fishermen reported the appearance of large numbers of octopuses.’

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 is mistakenly formed according to rules for Latin plurals, and is therefore incorrect

Origin

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

Pronunciation:

octopus

/ˈäktəpəs/