From Longman Dictionary of Contemporary Englishnutritionistnu‧tri‧tion‧ist /njuːˈtrɪʃənɪst $ nuː-/ noun [countable] someone who has a special knowledge of nutrition
Examples from the Corpus
nutritionist• Then he looked for a nutritionist.• I have a nutritionist who travels with me and works out a daily menu.• In some instances an interview with a nutritionist will be desirable in addition to or in lieu of laboratory studies.• Public health significance arid the role of the community dietitian / nutritionist.• Both the carp angler and the fish nutritionist want the carp to take their bait or diet.• He had refused, however, and sought advice privately from a medically qualified nutritionist.• Note from the action plan that both the nurse and the nutritionist perform height, weight, and skinfold measurements. 