From Proto-Indo-European *badyo- (yellow, brown). Cognate to Old Irish buide (yellow).



badius (feminine badia, neuter badium); first/second-declension adjective

  1. (usually of horses) reddish brown, chestnut colored, bay


First/second-declension adjective.

Number Singular Plural
Case / Gender Masculine Feminine Neuter Masculine Feminine Neuter
Nominative badius badia badium badiī badiae badia
Genitive badiī badiae badiī badiōrum badiārum badiōrum
Dative badiō badiō badiīs
Accusative badium badiam badium badiōs badiās badia
Ablative badiō badiā badiō badiīs
Vocative badie badia badium badiī badiae badia


  • English: bay
  • French: bai
  • Galician: baio
  • Italian: baio
  • Portuguese: baio, baço
  • Spanish: bayo, bazo


  • badius in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • badius 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)
  • badius in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
  • badius in William Smith, editor (1848) A Dictionary of Greek Biography and Mythology, London: John Murray