subscience

subscience

(ˈsʌbˌsaɪəns)
n
a science or field of study within another field of science or study
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
In the 1950s, argon was critical to the emergence of geochronology, the subscience of dating rocks based on the atomic decay rates of unstable elemental isotopes.
In reality, however, modern welding is a booming, high-tech subscience of metallurgy.