Terminology for dragons

Webster’s Dictionary
drag.on ‘drag-en n dracon-,draco serpent,dragon, [fr.GK drakon;akin to OE torht bright,Gk derkesthai to see,look at]

archaic: a huge serpent
a fabulous animal usually represented as a monstrous winged and scaly serpent or saurian with a crested head and enormous claws.

Tormont Illustrated Encyclopedia
drag’en n.
1. a. A fabulous monster, represented usually as a gigantic reptile breathing fire and having a lion’s claws, the tail of a serpent, wings and scaly skin.
b. A figure or other representation of this creature.
2. Archaic. A large snake or serpent [Middle English drago(u)n, from Old French dragon, from Latin draco (stem dracon-), dragon, serpent, from Greek drakon, serpent]