1) Medical specialty 1) Minor 
A subspecialty is a narrow field within a specialty such as forensic pathology, which is a subspecialty of anatomical pathology. A subspecialist is a specialist of a subspecialty. In medicine, subspecialization is particularly common in internal medicine, cardiology, and neurology, and has grown as medicine has: == Notes and references == ...
a lesser or minor specialty: a cinematographer with a subspecialty of portrait photography.