Lewis Short
(adjective) : auctĭōnārĭus, a, um, id.
* Of or pertaining to an auction, auction-: atria,wherein auctions were held,Cic. Agr. 1, 3; Inscr. Orell. 3883 (v. atrium): tabulae,catalogues of goods to be sold by auction,Cic. Cat. 2, 8, 18.
Charlton T. Lewis, Charles Short, A Latin Dictionary