Geometric object moved along a path to generate a shape
Look up generatrix in Wiktionary, the free dictionary.
In geometry, a generatrix (/dʒɛnəˈreɪtrɪks/) or describent is a point, curve or surface that, when moved along a given path, generates a new shape.[1] The path directing the motion of the generatrix motion is called a directrix or dirigent.[2]
^"generatrix". merriam-webster.com. Retrieved 11 September 2014.
^"generatrix". mathopenref.com. Retrieved 11 September 2014.