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dietitian

or di·e·ti·cian

[dahy-i-tish-uh n]
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noun
  1. a person who is an expert in nutrition or dietetics.

Origin of dietitian

1840–50; diet1 + -itian; see -ician
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for dietician

dietician

dietitian

noun
  1. a person who specializes in dietetics
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dietician

n.

1845, from diet (n.1) on model of physician. Earlier was dietist (c.1600).

dietitian

n.

see dietician.

Online Etymology Dictionary, © 2010 Douglas Harper

dietician in Medicine

dietitian

n.
  1. A person specializing in dietetics.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.