A star glyph creates n rays emanating at equal angles from
a point on the screen, where n is the dimensionality of the data set. One glyph
exists for each point in the set.
Sometimes these glyphs can be positioned on screen according
to two or three of the dimensions of the dataset. In other cases, position on-screen
is arbitrary.
This picture was obtained from Matt Ward's XmdvTool home page.