microdot

/ˌmaɪkrəˈdɑt/

Other forms: microdots

Definitions of microdot

1. noun

   photograph reduced to the size of a dot (usually for purposes of security)
   type of:

   exposure, photo, photograph, pic, picture

   a representation of a person or scene in the form of a print or transparent slide; recorded by a camera on light-sensitive material