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Etymology 1[edit]

From Proto-Indo-European *mḗh₁n̥s (moon, month), probably from Proto-Indo-European *meh₁- (to measure), referring to the moon's phases as the measure of time. Cognate with Ancient Greek μήν (mḗn), μήνη (mḗnē), English month; Scots moneth (month); North Frisian muunt (month); Saterland Frisian Mound (month), Dutch maand (month); German Low German Maand, Monat (month); German Monat (month); Danish måned (month); Swedish månad (month); Icelandic mánuði (month); Armenian ամիս (amis); Old Irish ; Old Church Slavonic мѣсѧць (měsęcĭ).



mēnsis m (genitive mēnsis); third declension

  1. month

Third declension i-stem.

Case Singular Plural
Nominative mēnsis mēnsēs
Genitive mēnsis mēnsium
Dative mēnsī mēnsibus
Accusative mēnsem mēnsēs
Ablative mēnse mēnsibus
Vocative mēnsis mēnsēs
Derived terms[edit]
Related terms[edit]

Etymology 2[edit]

Inflected form of mēnsa (table).




  1. dative plural of mēnsa
  2. ablative plural of mēnsa


  • mensis in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • mensis in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • mensis in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
  • mensis in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  • Carl Meissner; Henry William Auden (1894) Latin Phrase-Book[1], London: Macmillan and Co.
    • to hold out for four months: obsidionem quattuor menses sustinere
    • (ambiguous) the intercalary year (month, day): annus (mensis, dies) intercalaris
  • mensis in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
  • mensis in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin