subscience
noun
sub·sci·ence ˈsəb-ˌsī-ən(t)s 
variants or sub-science
plural subsciences or sub-sciences
: a field of science that is part of a broader field
the subscience of evolutionary biology
… science is a diverse, social enterprise that has … developed different methodologies in different subsciences …
Carlin Romano
Carlin Romano
Word History
First Known Use
1834, in the meaning defined above