dubium

• (Classical Latin) IPA^(key): /ˈdu.bi.um/, [ˈd̪ʊbiʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈdu.bi.um/, [ˈd̪uːbium]

Substantivized neuter of dubius (“doubtful”).

dubium n (genitive dubiī or dubī); second declension

1. doubt
2. A doctrinal question that is asked to Congregation for the Doctrine of the Faith and which later receives a responsa.

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• dubiōsus
• dubitō

• Italian: dubbio
• Piedmontese: dubi
• Romanian: dubiu
• → Dutch: in dubio

See the etymology of the corresponding lemma form.

dubium

1. inflection of dubius:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular

• “dubium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• dubium 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)
• dubium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.
• Carl Meißner, Henry William Auden (1894) Latin Phrase-Book‎^[1], London: Macmillan and Co.
  • (ambiguous) to throw doubt upon a thing: in dubium vocare
    
  • (ambiguous) to become doubtful: in dubium venire
    
  • (ambiguous) to leave a thing undecided: aliquid dubium, incertum relinquere