planimeter

[ pluh-nim-i-ter ]
/ pləˈnɪm ɪ tər /

noun

an instrument for measuring mechanically the area of plane figures.

Origin of planimeter

First recorded in 1855–60; plani- + -meter

Example sentences from the Web for planimeter

British Dictionary definitions for planimeter

planimeter
/ (plæˈnɪmɪtə) /

noun

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