- The symbol for infinity, which resembles the figure 8 on its side.
Etymology: From lemniscatus, lÄmniscÄtus "decorated with ribbons"
- (mathematics) Any closed curve (similar to a figure eight) described by a Cartesian equation of the form <math>(x^2 + y^2)^2 = a^2 (x^2 - y^2)\,</math>
Supplemental Details:Sponsor an extended definition for lemniscate for as little as $10 per month. Click here to contact us.