Rolodex

[ roh-luh-deks ]
/ ˈroʊ ləˌdɛks /

Trademark.

a small desktop file containing cards for names, addresses, and phone numbers.
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British Dictionary definitions for rolodex

Rolodex
/ (ˈrəʊləˌdɛks) /

noun

trademark mainly US a small file for holding names, addresses, and telephone numbers, consisting of cards attached horizontally to a rotatable central cylinder
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012