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dietitian

noun [C] (also dietician)
 
 
/ˌdaɪ.əˈtɪʃ.ən/

Definition

a person who scientifically studies and gives advice about food and eatingDiets and dietingMedical studies and the people who study them
(Definition of dietitian noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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