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box chronometer

British  

noun

  1. nautical a ship's chronometer, supported on gimbals in a wooden box

"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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One box chronometer, No.7,810, by French.

From Project Gutenberg

The darkness was such that my assistant had very great trouble in reading his box chronometer.

From Project Gutenberg