Manual Downloading Graphsketcher Using Graphsketcher Download GraphBlog Parabola General Definition: In  mathematics , the  parabola  (plural  parabolae  or  parabolas , pronounced  /pəˈræbələ/ , from the  Greek   παραβολή ) is a  conic section , the intersection of a right circular  conical surface  and a  plane  parallel to a generating straight line