[ dahy-i-ter-ee ]
/ ˈdaɪ ɪˌtɛr i /


of or relating to diet: a dietary cure.

noun, plural di·e·tar·ies.

a regulated allowance of food.
Obsolete. a system or course of diet.

Nearby words

  1. diestrus,
  2. diet,
  3. diet kitchen,
  4. diet pill,
  5. diet pyramid,
  6. dietary amenorrhea,
  7. dietary fiber,
  8. dietary fibre,
  9. dietary law,
  10. dietary supplement

Origin of dietary

1400–50; late Middle English dietarie system of diet. See diet1, -ary

Related formsdi·e·tar·i·ly, adverbpre·di·e·tar·y, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for dietary

British Dictionary definitions for dietary


/ (ˈdaɪətərɪ, -trɪ) /


of or relating to a diet

noun plural -taries

a regulated diet
a system of dieting
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 dietary



1610s, from Medieval Latin dietarius, from Latin diaetarius, from diaeta (see diet (n.1)).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for dietary


[ dīĭ-tĕr′ē ]


Of or relating to diet.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.