mensis

• mēnsis: (Classical) IPA^(key): /ˈmen.sis/, [ˈmẽːs̠ɪs̠]
• mēnsis: (Ecclesiastical) IPA^(key): /ˈmen.sis/, [ˈmɛnsis]
• mēnsīs: (Classical) IPA^(key): /ˈmen.siːs/, [ˈmẽːs̠iːs̠]
• mēnsīs: (Ecclesiastical) IPA^(key): /ˈmen.sis/, [ˈmɛnsis]

From Proto-Italic *mēnsis, extended from *mēns, from Proto-Indo-European *mḗh₁n̥s (“moon, month”), probably from *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”), Lithuanian mėnesis (“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 mí, Old Church Slavonic мѣсѧць (měsęcĭ).

mēnsis m (genitive mēnsis); third declension

1. a month.

Third-declension noun (i-stem).

Despite being an I-stem, this noun has the consonantal accusative singular termination -em and the consonantal ablative singular termination -e.

• mēnstruus
• mēnsuālis

• bimēstris
• mēnstrua
• mēnstruālis
• mēnstruō
• sēmēstris
• trimestris

See the etymology of the corresponding lemma form.

mēnsīs f

1. dative/ablative plural of mēnsa

See the etymology of the corresponding lemma form.

mēnsīs

1. dative/ablative masculine/feminine/neuter plural of mēnsus

• “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 with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• mensis in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
• Carl Meißner; Henry William Auden (1894) Latin Phrase-Book‎, 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