a person who specializes in dietetics
Collins Concise English Dictionary © HarperCollins Publishers::
di•e•ti•tian or di•e•ti•cian /ˌdaɪɪˈtɪʃən/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- Nutritiona person who is an expert in nutrition or dietetics.
di•e•ti•tian
(dī′i tish′ən),USA pronunciation n.
- a person who is an expert in nutrition or dietetics.
- 1840–50; diet1 + -itian; see -ician