In DragonVale for the Android & iOS devices (iPhone, iPad, etc.), the Meteor Dragon is a dragon with air and metal attributes.
The Meteor Dragon has a base breeding time of 14 hours, sells for 1,250,000 coins, and earns 150,000 XP for successful breeding once you reach level 17.
To get a Meteor Dragon, breed an Air Dragon with a Metal Dragon, or or any dragons with these properties and at least one additional property.
Check out my DragonVale Breeding Guide for more dragon breeding combinations.