1) Military rank of ancient Rome 
The draconarius was a type of signifer who bore a cavalry standard known as a draco in the Roman army. == Name == Strictly speaking, the word draconarius denotes the bearer of the military standard on which a dragon was represented.{sfn| Smith| Cheetham |1875|p=579} The term passed into Christian usage, and was applied to the bearer of the labarum...
Dragon bearer. late Roman standardbearer.
Literally, a dragon bearer, this was a Byzantine standard-bearer.