Tractory Tract"o*ry, n. [L. tractorius of drawing, fr. trahere, tractum, to draw.] (Geom.) A tractrix. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • tractory — …   Useful english dictionary

  • 1692 in science — The year 1692 in science and technology:Events* In the American colonies, the Salem Witch trials of 1692 develop, following 250 years of witch hunts in Europe.Mathematics* The tractrix, sometimes called a tractory or equitangential curve, is… …   Wikipedia

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