Draco

from The Century Dictionary.

• noun One of the ancient northern constellations, the Dragon.
• noun [lowercase] Aluminous exhalation from marshy grounds.
• noun A genus of old-world acrodont lizards, of the family Agamidœ, having a parachute formed of the integument stretched over extended hinder ribs, by means of which the animal protracts its leaps into a kind of flight. Draco volans, of the Malay peninsula, is the common flying-lizard or dragon. See dragon, 2.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Astron.) The Dragon, a northern constellation within which is the north pole of the ecliptic.
• noun A luminous exhalation from marshy grounds.
• noun (Zoöl.) A genus of lizards. See Dragon, 6.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun A taxonomic genus within the family Agamidae — gliding lizards from Southeast Asia.
• proper noun astronomy A circumpolar constellation of the northern sky, said to resemble a dragon. It features a line of stars (including Thuban) that winds between Ursa Major and Ursa Minor.
• proper noun The name of an Athenian lawgiver, known for the severity of his laws.
• proper noun Greek mythology One of Actaeon's hounds.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a faint constellation twisting around the north celestial pole and lying between Ursa Major and Cepheus
• noun a reptile genus known as flying dragons or flying lizards
• noun Athenian lawmaker whose code of laws prescribed death for almost every offense (circa 7th century BC)