Is it ensure, insure, or assure?


[pluh-nim-i-ter] /pləˈnɪm ɪ tər/
an instrument for measuring mechanically the area of plane figures.
1855-60; plani- + -meter Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for planimeter
  • The value indicated on the planimeter is converted to land area by using an appropriate conversion factor related to map scale.
  • Field measurements were made from aerial enlargements with a planimeter.
  • Ability to compute acreages using a calculator, planimeter, or computer.
  • Integration was done with a calibrated polar planimeter.
  • Surface integration is performed by using a planimeter and adding the areas.
  • Using a dot grid is a simple way to measure the drainage area, however there are other tools, such as a planimeter or digitizer.
British Dictionary definitions for planimeter


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
Cite This Source
Encyclopedia Article for planimeter

mathematical instrument for directly measuring the area bounded by an irregular curve, and hence the value of a definite integral.

Learn more about planimeter with a free trial on
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source

Word of the Day

Difficulty index for planimeter

Few English speakers likely know this word

Word Value for planimeter

Scrabble Words With Friends