/ Dictionary / Index N nutritionist: Meaning and Definition of Find definitions for: nu•tri•tion•ist Pronunciation: (n-trish'u-nist, ny-), [key] — n. a person who is trained or expert in the science of nutrition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nutritionist (Thesaurus) nutrition nutritious Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language