euthenics
noun
eu·then·ics yü-ˈthe-niks 
plural in form but singular or plural in construction
: a science that deals with development of human well-being by improvement of living conditions
euthenist
yü-ˈthe-nist ˈyü-thə-
noun ˈyü-thə- 
Word History
Etymology
Greek euthenein to thrive
First Known Use
1905, in the meaning defined above
Medical Definition
euthenics
noun, plural in form but singular or plural in construction
eu·then·ics yu̇-ˈthen-iks
: a science that deals with development of human well-being by improvement of living conditions