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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.

Case Singular Plural
nominative cōnscientia cōnscientiae
genitive cōnscientiae cōnscientiārum
dative cōnscientiae cōnscientiīs
accusative cōnscientiam cōnscientiās
ablative cōnscientiā cōnscientiīs
vocative cōnscientia cōnscientiae

Derived terms[edit]

Related terms[edit]



  • 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, 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 (accessed 27.02.03) 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)