LATIN DICTIONARYLexicon Latīnum
English → Latin

“hour” in Latin

The English word hour itself goes back to Latin hōra.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

hour
hora (both as the twenty-fourth part of a day and as an indefinite portion of time): horae spatium (the definite space of one hour): horae momentum (the short space of an hour, considered as the space within which something happens). Half an hour, semihora: an hour and a half, sesquihora: three quarters of an hour, dodrans horae (Plin., 2, 14, 11): the twenty-fourth part of an hour, semuncia horae (ib.): in an hour, in hora: in a single hour, in hora una (Plaut.): above an hour, more than an hour, hora amplius or horam amplius (e.g., hora or horam amplius... jam moliebantur, Cic., Verr., 4, 43, 95, where Zumpt reads hora, Orell., horam: ☞ Zumpt’s note, who shows that both forms are allowable): an hour before, etc., hora ante, quara, etc.: in or within three hours, intra tres horas; tribus horis: in the short space of an hour, horae momento: in a few hours, brevi horarum momento (Justinus, 2, 14); paucis momentis (in a short space of time; e.g., multa natura aut affingit, aut mutat, etc., Cic.): in a very few hours, paucis admodum horis: three hours (long), tres horas; per tres horas: for several hours, per aliquot horarum spatia: from hour to hour, in horas: every hour; [Vid: HOURLY]: from this very hour, inde ab hoc temporis momento: to have hardly four hours start of anybody, vix quatuor horarum spatio antecedere (i. e., to be four hours’ march before him, Caes.): at or to the hour (the fixed hour), ad horam: every hour, omni tempore: up to this hour, adhuc (☞ not hucusque, which never relates to time). In dating his letters he always added the hour at which they were finished, ad omnes epistolas horarum momenta, quibus datae significarentur, addebat: in the last years of his life, Maecenas never got an hour’s sleep, Maecenati triennio supremo nullo horae momento contigit somnus: to sleep for several hours together, plures horas et eas continuas dormire (after Suet., Oct., 78): hardly to utter a word an hour, horis decem verba novem dicere (Martisalis, 8, 7): day and hour, tempus et dies: the hour of anybody’s birth, hora natalis (Hor., Od., 2, 17, 18), or hora qua aliquis gignitur or genitus est (after Justinus, 37, 2, 2; both of the hour of a child’s birth); tempus pariendi (with reference to the mother): anybody’s last hour, hora novissima or suprema: in his last hours, eo ipso die, quo e vita excessit: leisure hours, otium: tempus otiosum (when we have no business on our hands), tempus subsecivum (the time one gets or steals, as it were, from one’s business or studies): to steal an hour or two from one’s studies, aliquid subsecivi temporis studiis suis subtrahere: to grant a few hours’ delay, dieculam addere (Ter., Andr., 5, 2, 27): lost hours, horae perditae (after Plin., Ep., 3, 5, 16, poteras has horas non perdere).
The Hours (goddesses), Horae.

Quick answer

What is the Latin word for hour?
The usual Latin words for “hour” are hōra, sēmihōra, sēsquihōra. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.