tractrix

== English == === Etymology === Formed after tractor, as if from a Latin *tractrīx (from trahō (“to pull”) +‎ -trīx). === Pronunciation === === Noun === tractrix (plural tractrices) (geometry) A curve that satisfies the following property: that segment of the tangent line that lies between the point of tangency and a fixed line has length independent of the point of tangency chosen. ==== Translations ==== ==== Further reading ==== tractrix on Wikipedia.Wikipedia === References === “tractrix, n.”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.