ad val

[adv] - in proportion to the estimated value of the goods taxed
Found on http://www.webdictionary.co.uk/definition.php?query=ad%20val

ad val

ad valorem adverb in proportion to the estimated value of the goods taxed; `the goods were taxed ad valorem`
Found on http://wordnetweb.princeton.edu/perl/webwn?s=ad%20val
No exact match found