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di·e·tet·ics | \ ˌdī-ə-ˈte-tiks 
\
\Definition of dietetics
: the science or art of applying the principles of nutrition to the diet
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dietetics
noun plural but singular or plural in constructiondi·etet·ics | \ -ˈtet-iks \
\Medical Definition of dietetics
: the science or art of applying the principles of nutrition to feeding
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The first known use of dietetics was in 1799
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