Nurse Iconography: Pull Cord photo: JParadisi 2010
Iconography Definition
(source: MSN Encarta Dictionary)
1. set of recognized images: the set of symbols or images used in a particular field of activity such as music or the movies and recognized by people as having a particular meaning
In the 1960s, peace signs, long hair, work shirts, and blue jeans were part of the iconography of rebellion.
2. symbols in painting: the symbols and images used conventionally in a genre of painting, or the study and interpretation of these symbols and images
the iconography used in Renaissance paintings of the Virgin and Child
3. images of somebody or something specific: the collection, description, or study of images of somebody or something specific
i•co•nog•ra•pher noun
i•con•o•graph•ic [ ī kònnə gráffik ] adjective
i•con•o•graph•i•cal adjective
Die Krankenschwester 
How many years has it been since we wore those hats? Well, I guess they still do in some countries.
I know. My nursing class voted against wearing them, much to the chagrin of the nursing school’s board. However,they allowed our decision. We had four male students in our class, and caps divided us by gender before we were nurses.