octopii

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A form of octopus — Any of several marine molluscs of the order Octopoda, having no internal or external protective shell or bone (unlike the nautilus, squid and cuttlefish) and eight arms each covered with suckers.

Scrabble 11

Meanings

noun
  1. misconstructionnonstandardpluralproscribedrareMisconstructed plural of octopus.

Origin

From octopus + -ii. Replacing -us with -ii is a nonstandard pluralization pattern based on rebracketing of Latin nominative plural forms from nouns ending in -ius, such as radius > radii. Compare walrii and penii.

Full word history & related roots →
Cite this entry
APA

octopii. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/octopii

MLA

“octopii.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/octopii. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “octopii,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/octopii.

Source: octopii on Wiktionary, CC BY-SA 4.0.