French

Noun

quatuor m ‎(plural quatuors)

1. (music) quartet (composition)
2. (music) quartet (group of musicians)
3. (sexuality) foursome

Latin

Numeral

quātuor ‎(indeclinable)

1. medieval spelling of quattuor

References

• Félix Gaffiot (1934), “quatuor”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.
• quatuor in Ramminger, Johann (accessed 16 July 2016) Neulateinische Wortliste: Ein Wörterbuch des Lateinischen von Petrarca bis 1700, pre-publication website, 2005-2016