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From cōnsciēns (conscious) +‎ -ia, a calque of Ancient Greek συνείδησις (suneídēsis).





cōnscientia f (genitive cōnscientiae); first declension

  1. knowledge shared with others, being in the know or privy to, joint knowledge; complicity
  2. knowledge within oneself, consciousness, feeling
  3. knowledge within oneself of right or wrong; conscience; remorse



First-declension noun.

Case Singular Plural
Nominative cōnscientia cōnscientiae
Genitive cōnscientiae cōnscientiārum
Dative cōnscientiae cōnscientiīs
Accusative cōnscientiam cōnscientiās
Ablative cōnscientiā cōnscientiīs
Vocative cōnscientia cōnscientiae

Derived terms





  • conscĭentĭa”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • conscientia”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • conscientia in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
  • conscĭentĭa in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette, pages 398–399.
  • Carl Meißner, Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • a good conscience: conscientia recta, recte facti (factorum), virtutis, bene actae vitae, rectae voluntatis
    • a guilty conscience: conscientia mala or peccatorum, culpae, sceleris, delicti
    • to be conscience-stricken: conscientia morderi (Tusc. 4. 20. 45)
    • his guilty conscience gives him no rest: conscientiae maleficiorum stimulant aliquem
    • to be tormented by remorse: conscientia mala angi, excruciari
    • to congratulate oneself on one's clear conscience: conscientia recte factorum erigi
  • conscientia in Ramminger, Johann (2003 February 27 (last accessed)) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700[2], pre-publication website, 2005-2016
  • conscientia” on page 411/1 of the Oxford Latin Dictionary (1st ed., 1968–82)