- 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.
- (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.
- ^ 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).