planimeter

pla·nim·eter (plə nim′ət ər, plā-)

noun

an instrument for measuring the area of a regular or irregular plane figure by tracing the perimeter of the figure

Etymology: Fr planimètre: see plani- & -meter

pla·ni·met·ric (plā′ni me′trik, plan′i-) adjective pla·nim′·etry noun

Converse of object

use: Cartometry is represented by some very old planimeters used for the measurement of areas.

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