Definition of octopus in English:

octopus

Pronunciation /ˈäktəpəs/ /ˈɑktəpəs/

nounoctopuses

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

    Order Octopoda, class Cephalopoda: Octopus and other genera

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 Octopoda).

Pronunciation

octopus

/ˈäktəpəs/ /ˈɑktəpəs/