tractrix
'træktriks
基本解释
等切面曲线, 曳物线
英文释义
n. A curve such that the part of the tangent between the
point of tangency and a given straight line is constant; -- so called
because it was conceived as described by the motion of one end of a
tangent line as the other end was drawn along the given line.
上一个单词：tractotomy
下一个单词：tracts