- A dragon; a kind of snake or serpent.
- The standard of a Roman cohort, shaped like an Egyptian crocodile ('dragon') head.
- The astronomical constellation Draco, in Latin also called Anguis or Serpens 
- (ecclesiastic) The Devil.
Draco usually connoted larger sorts of snakes in Classical usage, particularly those which seemed exotic to the Romans. One traditional rule gives the distinction among the various Latin synonyms as anguis being a water snake; draco being a "temple" snake, the sort of large, exotic snake associated with the guardianship of temples; and serpens being a common terrestrial snake. This rule is not universally credited, however.
- → Albanian: dreq, dragua
- Aromanian: dracu, drac
- Asturian: dragón
- Catalan: drac, dragó
- → Czech: drak
- → English: Draco
- Old French: dragon, dragun
- Friulian: drâc, dragon
- → Germanic: *drakô (see there for further descendants)
- Italian: drago, dragone
- Megleno-Romanian: drac
- Occitan: drac, Occitan: dragon
- → French: drac
- Old Portuguese: dragon
- Romanian: drac
- Sardinian: dragone
- Sicilian: dragu
- Old Spanish: dragon
- Venetian: dragon
- → Welsh: draig
- draco in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- draco in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
- du Cange, Charles (1883), “draco”, in G. A. Louis Henschel, Pierre Carpentier, Léopold Favre, editors, Glossarium Mediæ et Infimæ Latinitatis (in Latin), Niort: L. Favre
- draco in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français [Illustrated Latin-French Dictionary], Hachette
- draco in The Perseus Project (1999) Perseus Encyclopedia
- draco in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
- draco in William Smith, editor (1854, 1857) A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
- draco in William Smith et al., editor (1890) A Dictionary of Greek and Roman Antiquities, London: William Wayte. G. E. Marindin
- ^ Georges, F. Calonghi, O. Badellino, Dizionario latino-italiano, Rosenberg & Sellier, 3° edition, Turin, 1989
- ^ James Fergusson, Tree and serpent Worship, or illustrations of mythology and art in India in the 1st and 4th cent. a. Chr, London: Allen and Co.,1868, page 13 (note).