book end
noun
one of a pair of usually ornamental supports for holding a row of books upright
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
Examples from the Web for book-end
Contemporary Examples of book-end
The book-end nuclear threats from North Korea and Iran come first to mind.
