Home › Words › V › videndumvidendumvidendum means that which is to be seen.Among words judged in Lexicurio's Arena, videndum ranks #2,613 of 42,762 for Qualifying.nounThat which is to be seen.e.g.“We agree with Mr. Clarke regarding the videnda of European travel […]” — 1852, The Christian Examiner, page 247:Definitions & examples from Wiktionary (CC BY-SA 3.0).