planimeter
noun
pla·nim·e·ter
plā-ˈni-mə-tər 
plə-
: an instrument for measuring the area of a plane figure by tracing its boundary line
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In the 1800s, an invention called the planimeter consisted of a little wheel, a shaft, and a linkage.
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Charles Platt, WIRED, 30 Mar. 2023
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Charles Platt, WIRED, 30 Mar. 2023
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“Planimeter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/planimeter. Accessed 28 Feb. 2025.
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planimeter
noun
pla·nim·e·ter
plā-ˈnim-ət-ər, plə-
: an instrument for measuring the area of a plane figure by tracing its boundary line
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