The Parthenon Descriptor is a term used to describe the style of architecture used in the construction of the Parthenon, which is an ancient Greek temple located on the Acropolis of Athens. The style of architecture used in the Parthenon is known as Doric, which is a five-letter word. Doric architecture is characterized by its simplicity and strength, with columns that are fluted and have no base. This style of architecture was popular in Ancient Greece and was used in many other temples and buildings.