The Collaborative International Dictionary
Ad valorem \Ad va*lo"rem\ [L., according to the value.] (Com.) A term used to denote a duty or charge laid upon goods, at a certain rate per cent upon their value, as stated in their invoice, -- in opposition to a specific sum upon a given quantity or number; as, an ad valorem duty of twenty per cent.
Douglas Harper's Etymology Dictionary
Wiktionary
a. Measured by or in proportion to value.
WordNet
adv. in proportion to the estimated value of the goods taxed; "the goods were taxed ad valorem" [syn: ad val]
Wikipedia
Ad Valorem (foaled 27 April 2002) is an American-bred, Irish-trained Thoroughbred racehorse and sire. He was one of the leading European two-year-olds of 2004, when he was unbeaten in three races including the Middle Park Stakes. He failed to win in 2005 but returned as a four-year-old to win the Queen Anne Stakes. Since his retirement he has had some success as a sire of winners in Australia.
Usage examples of "ad valorem".
That is the one grim truth of this election most likely to come back and haunt us: The options were clearly defined, and all the major candidates except Nixon were publicly grilled, by experts who demanded to know exactly where they stood on every issue from Gun Control and Abortion to the Ad Valorem Tax.
Checkbook, journal, ledger, inventory sheets, payroll, withholding, state sales tax, ad valorem tax records.
During the years 3645-46, Imperial relations with the Fuardian Conglomerate became increasingly strained, and a number of colony systems protested the ad valorem and ad personam taxes levied by the Empire to support the infrastructure necessary to restrain the Conglomerate.
It is not necessarily representative per capita, but it most surely is ad valorem.
The assassin had isolated the terminal, ad valorem, and the price was high, but there was an absence of the finer points of the deadly equation.