"Octopus" is from the Greek. "Octopi" would be the plural if it were Latin. The correct Greek pluralization would be "octopodes" (oct-TUP-oh-deez). However, as one lexicographer put it "the only time ...

This volume is full of unexpected revelations, not for the squeamish, starting with the fact that the preferred plural of “octopus” is “octopuses,” not “octopi.” Octopuses, we learn, can lurch onto ...

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