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grandmother clock

British  

noun

  1. a longcase clock with a pendulum, about two thirds the size of a grandfather clock

"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

Example Sentences

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Taking the form of a 7-foot grandmother clock, the towering form houses an oral history booth where residents can record their stories and share their desires for the future.

From New York Times