from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The 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.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A transcendental curve invented by Christian Huygens (1629–95), the property of which is that the distances along the different tangents from the points of contact to the intersections of a certain line are all equal.
Sorry, no etymologies found.