widescreen

As nouns the difference between taxonomy and widescreen

is that taxonomy is the science or the technique used to make a classification while widescreen is a screen with a wider aspect ratio than the ordinary 35-millimeter frame, making more effective use of the human field of view and producing a more immersive view experience.

As an adjective widescreen is

(film) filmed in a greater aspect ratio than the 133:1 or 137:1 aspect ratio.