seven-arm octopus

noun

Haliphron atlanticus, a species of octopus, notable for its large size.

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Meanings

nounseven-arm octopus (plural seven-arm octopuses or (nonstandard) seven-arm octopusses or (nonstandard) seven-arm octopi or (nonstandard) seven-arm octopii or (rare) seven-arm octopodes or (rare, nonstandard) seven-arm octopus)

plural seven-arm octopuses · nonstandard plural seven-arm octopusses · nonstandard plural seven-arm octopi · nonstandard plural seven-arm octopii · plural rare seven-arm octopodes

  1. Haliphron atlanticus, a species of octopus, notable for its large size.

Origin

Because in male seven-arm octopuses, one of their tentacles is smaller and concealed, and is often overlooked.

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Cite this entry
APA

seven-arm octopus. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/seven-arm%20octopus

MLA

“seven-arm octopus.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/seven-arm%20octopus. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “seven-arm octopus,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/seven-arm%20octopus.

Source: seven-arm octopus on Wiktionary, CC BY-SA 4.0.