integraph

[in-ti-graf, -grahf]
noun
integrator ( def 2 ).

Origin:
1880–85; blend of integrate and -graph

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Encyclopedia Britannica
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integraph

mathematical instrument for plotting the integral of a graphically defined function. Two such instruments were invented independently about 1880 by the British physicist Sir Charles Vernon Boys and the Lithuanian mathematician Bruno Abdank Abakanowicz and were later modified and improved by others. The integraph draws the graph of the integral as the user traces the graph of the given function

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Integraph software available throughout the department.
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