What is the determination of a straight line whose length is equal a portion of a curve. Rectification of a globe (Astron.), its adjustment preparatory to the solution of a proposed problem called?

rectification — (Geom.) The determination of a straight line whose length is equal a portion of a curve. Rectification of a globe (Astron.), its adjustment preparatory to the solution of a proposed problem. (Webster's 1913.)

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