antidictionary

an·ti·dic·tion·a·ry
A1N1T1I1D2I1C3T1I1O1N1A1R1Y4
UK/æntɪˈdɪkʃ(ə)nəɹi/UK/æntɪˈdɪkʃənɹi/US/æntiˈdɪkʃəˌnɛɹi/US/-taɪ-/

noun

The set of all words of minimal length that never appear in a particular string.

Scrabble 20

Meanings

nounantidictionary (plural antidictionaries)

plural antidictionaries

  1. computationalThe set of all words of minimal length that never appear in a particular string.

    An antidictionary method is based on an inverse kind of knowledge. Such a method maintains an antidictionary with strings that do not appear in the input. Using the antidictionary, the encoder can often predict the next data symbol […]

    2010, David Salomon, Giovanni Motta, Handbook of Data Compression, Springer Science & Business Media, →ISBN, page 430

Origin

  1. Proto-Indo-European*h₂ent-
  2. Proto-Indo-European*h₂énts
  3. Proto-Indo-European*h₂énti
  4. Ancient Greekᾰ̓ντῐ́ (ăntĭ́)
  5. Ancient Greekἀντι- (anti-)
  6. Englishanti-
  7. Proto-Indo-European*deyḱ-
  8. Proto-Indo-European*déyḱeti
  9. Proto-Italic*deikō
  10. Latindīcō
  11. Latindictiō
  12. Latindictiōnārius?
  13. Medieval Latindictiōnārium
  14. Middle Englishdixionare
  15. Englishdictionary
  16. Englishantidictionary

From anti- (“opposite of, reverse”, prefix) + dictionary.

Full word history & related roots →

Translations

French antidictionnaire
  • antidictionnaireset of all words of minimal length that never appear in a particular string
Portuguese antidicionário
  • antidicionárioset of all words of minimal length that never appear in a particular string

Rhymes & wordplay

Rhymes with antidictionary

All rhymes →
Cite this entry
APA

antidictionary. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/antidictionary

MLA

“antidictionary.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/antidictionary. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “antidictionary,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/antidictionary.

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