A person who practices or advocates for a particular diet or dietary system; someone concerned with dietary practices.
From 'diet' + '-arian' (suffix meaning 'one who practices'). Related to 'vegetarian' and 'fruitarian', these -arian terms became popular in the 19th century to describe lifestyle choices.
The first dietarians in the 1800s were often dismissed as eccentric, but their obsession with food science and health eventually gave birth to modern nutrition as a legitimate field of study.
Complete word intelligence in one call. Free tier — 50 lookups/day.