Here is the list of  dimension and metrics along with definitions that is used in Tatvic Google Analytics Excel Plugin.
Metrics Definition :
Ad cost : Derived cost for the advertising campaign. The currency for this value is based on the currency that you set in your AdWords account.
Bounces : This field identifies the number of [...]

The Standards Committee have been hard at work. We took the definitions document from last year, and have totally revamped the definitions based on your feedback. We’ve added a few new definitions, but one of the things we’re most excited about is our new “Ask Your Vendor” questions, where we’ve highlighted places where different vendors [...]