indexical

“It’s a bold move for an indexical museum at a university to do something like this, because it’s touching into contemporary art practice,” Mr. Biggers said.

So these glimpses of color are both metaphors for things in life and small indexical signs of how Scully creates those illusions.

These different definitions are often referred to as "indexical" because different contexts indicate, or index, different meanings.

It has the breathtaking presence and indexical power of a burial shroud.

The clothes of the sitters invariably become indexical, but what is omitted is equally revealing.