RolodexR card file

Rolodex Rol"o*dex (r[^o]l"[-o]*d[e^]ks), a. [Trade Mark of Newell Office Products.] A trade name for a type of card file; as, a Rolodex(R) card file. Also used informally and improperly as a noun meaning {Rolodex(R) card file}. [PJC]