octa-

prefix

Eight.

OriginAncient Greek ὀκτᾰ- (oktă-) ← Proto-Hellenic *oktṓ ← Proto-Indo-European *oḱtṓw →
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Meanings

prefix

alternative oct- · alternative octo- · alternative ogdo-

  1. Eight.

Synonyms & antonyms

Also see
octo-

Origin

  1. Proto-Indo-European*oḱtṓw
  2. Proto-Hellenic*oktṓ
  3. Ancient Greekὀκτώ (oktṓ)
  4. Ancient Greekὀκτᾰ- (oktă-)
  5. Englishocta-

From Ancient Greek ὀκτα- (okta-, “eight”); compare ὀκτώ (oktṓ).

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

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

MLA

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

Chicago

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

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