Iconography
Iconography was the branch of art history which studied or analyzed the  subject matter and meaning of the content of images.

According to Hoshi Sato, Xindi-Insectoid iconography was different from the iconography used by the other Xindi species. ()

In 2256, the iconography on the side of a device was identified as Klingon. ()

See also 
 Ideography

External link 
 
Linguistics