octal

O1C3T1A1L1
UK/ˈɒk.təl/

noun

The number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.

Similar
base 8octonarybase-8
Less commonScrabble 7
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Meanings

nounoctal (countable and uncountable, plural octals, abbreviation oct)

plural octals · abbreviation oct

  1. uncountablearithmeticThe number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.

    Synonyms: base 8, octonary

  2. countablearithmeticA digit or value in the octal number system.
adjectiveoctal (not comparable)
  1. not comparablearithmeticConcerning numbers expressed in octal or mathematical calculations performed using octal.
  2. historicalnot comparableBeing or relating to a kind of tube socket base having eight pins.

Synonyms & antonyms

nounThe number system that uses the eight digits 0, 1, 2, 3, 4, 5, 6, 7.

Similar
base 8octonary
Similar
base-8
Also see
octaryoctonary

Origin

From oct- + -al.

Full word history & related roots →

Translations

Chinese Mandarin 八進制 /八进制
  • 八進制 /八进制 (bājìnzhì)concerning numbers expressed in octal or mathematics calculations performed using octal
Czech osmičkový
  • osmičkovýconcerning numbers expressed in octal or mathematics calculations performed using octal
Esperanto okuma
  • okumaconcerning numbers expressed in octal or mathematics calculations performed using octal
Finnish oktaalinen
  • oktaalinenconcerning numbers expressed in octal or mathematics calculations performed using octal
German Oktal-, Achter-
  • Oktal-concerning numbers expressed in octal or mathematics calculations performed using octal
  • Achter-concerning numbers expressed in octal or mathematics calculations performed using octal
  • oktalconcerning numbers expressed in octal or mathematics calculations performed using octal
Greek οκταδικός
  • οκταδικός (oktadikós)concerning numbers expressed in octal or mathematics calculations performed using octal
Hindi अष्टाधारी
  • अष्टाधारी (aṣṭādhārī)concerning numbers expressed in octal or mathematics calculations performed using octal
Hungarian oktális, nyolcas
  • oktálisconcerning numbers expressed in octal or mathematics calculations performed using octal
  • nyolcasconcerning numbers expressed in octal or mathematics calculations performed using octal
Italian ottale
  • ottaleconcerning numbers expressed in octal or mathematics calculations performed using octal
Polish ósemkowy
  • ósemkowyconcerning numbers expressed in octal or mathematics calculations performed using octal
Romanian octal
  • octalconcerning numbers expressed in octal or mathematics calculations performed using octal
Russian восьмери́чный
  • восьмери́чный (vosʹmeríčnyj)concerning numbers expressed in octal or mathematics calculations performed using octal
Thai อัฐนิยม
  • อัฐนิยมconcerning numbers expressed in octal or mathematics calculations performed using octal
Turkish sekizli
  • sekizliconcerning numbers expressed in octal or mathematics calculations performed using octal

Rhymes & wordplay

Anagrams

Tocalactoltlaco
Cite this entry
APA

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

MLA

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

Chicago

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

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