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planimeter

[pluh-nim-i-ter] /pləˈnɪm ɪ tər/
noun
1.
an instrument for measuring mechanically the area of plane figures.
Origin of planimeter
1855-1860
1855-60; plani- + -meter
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for planimeter

planimeter

/plæˈnɪmɪtə/
noun
1.
a mechanical integrating instrument for measuring the area of an irregular plane figure, such as the area under a curve, by moving a point attached to an arm around the perimeter of the figure
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
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