I need to reference the definition of trade discount rates. I looked on dictionary.com and Yahoo. I don't know of any other sites that have a dictionary. Wanted to know if any one could help?

I need to reference the definition of trade discount rates. I looked on dictionary.com and yahoo. I dont know of any other sites that have a dictionary. Wanted to know if any one could help?
Trade Discount Rates, are The rates or percentages used to discount Merchandise.

Economics.about.com... the url didn't show but try this site...

The rate (such as 25%) that is multiplied by the list price to determine the trade discount amount.