subspecialist
noun
sub·spe·cial·ist ˌsəb-ˈspe-sh(ə-)list 
variants or less commonly sub-specialist
plural subspecialists also sub-specialists
: a person who specializes in an occupation, practice, or field of study that is part of a broader specialty : an expert in or student of a subspecialty
Subspecialists who routinely treat patients with diseases of the external eye and the cornea …
Stephanie Bernardo Johns
Stephanie Bernardo Johns
Word History
First Known Use
1892, in the meaning defined above
Medical Definition
subspecialist
noun
sub·spe·cial·ist
ˌsəb-ˈspesh-(ə-)ləst
: a physician having a subspecialty