octo-

prefix

eight

Similar
octa-ogdo--oct-
OriginLatin octō ← Proto-Italic *oktō ← Proto-Indo-European *oḱtṓw →
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Meanings

prefix
  1. eight

    Synonyms: octa-, ogdo-, -oct-

Synonyms & antonyms

prefixeight

Similar
octa-ogdo--oct-
Also see
ogdo-

Origin

  1. Proto-Indo-European*oḱtṓw
  2. Proto-Hellenic*oktṓ
  3. Ancient Greekὀκτώ (oktṓ)
  4. Proto-Indo-European*oḱtṓw
  5. Proto-Italic*oktō
  6. Latinoctō
  7. Englishocto-

From Ancient Greek ὀκτώ (oktṓ, “eight”) and Latin octō (“eight”).

More words from Ancient Greek, Latin

Full word history & related roots →
Cite this entry
APA

octo-. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/octo-

MLA

“octo-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/octo-. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “octo-,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/octo-.

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