noun plural but singular or plural in construction Etymology: Greek euthenein to thrive Date: 1905 a science that deals with development of human well-being by improvement of living conditions, euthenist noun
EUTHENICS
Meaning of EUTHENICS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012