IPA: //daɪˈɛtɪʃən//
KK: /daɪˈɛtɪʃən/
A professional who is trained to advise people on what to eat in order to lead a healthy lifestyle or achieve specific health goals.
After my diagnosis, I consulted a dietitian to help me plan my meals.
Dietitian → It is formed from "diet" (from Old French *diete*, meaning a way of life or regimen) and "-itian" (a suffix used to denote a person associated with a specific field). A dietitian is a person who specializes in dietary practices and nutrition.
Think of 'diet' as a way of life and remember that a dietitian is someone who helps you with your dietary choices.