**Sub·tan'gent** * noun* * (Geom.)* The part of the axis contained between the ordinate and tangent drawn to the same point in a curve.

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http://www.encyclo.co.uk/webster/S/228

<geometry> The part of the axis contained between the ordinate and tangent drawn to the same point in a curve. ... Source: Websters Dictionary ... (01 Mar 1998) ...

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http://www.mondofacto.com/facts/dictionary?subtangent

• (n.) The part of the axis contained between the ordinate and tangent drawn to the same point in a curve.

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http://thinkexist.com/dictionary/meaning/subtangent/

In geometry, the subtangent and related terms are certain line segments defined using the line tangent to a curve at a given point and the coordinate axes. The terms are somewhat archaic today but were in common use until the early part of the 20th century. ==Definitions== Let P = (x, y) be a point on a given curve with A = (x, 0) its projection o

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http://en.wikipedia.org/wiki/Subtangent

A subtangent is the segment of a produced axis intercepted between an ordinate and a tangent, both drawn from the same point in the curve.

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http://www.probertencyclopaedia.com/browse/GS.HTM

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