malnutrition

[mal-noo-trish-uhn, -nyoo-]
noun
lack of proper nutrition; inadequate or unbalanced nutrition.

Origin:
1860–65; mal- + nutrition

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Collins
World English Dictionary
malnutrition (ˌmælnjuːˈtrɪʃən)
 
n
lack of adequate nutrition resulting from insufficient food, unbalanced diet, or defective assimilation

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

malnutrition
1862, from mal- + nutrition.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

malnutrition mal·nu·tri·tion (māl'nōō-trĭsh'ən, -nyōō-)
n.
Poor nutrition because of an insufficient or poorly balanced diet or faulty digestion or utilization of foods.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
malnutrition   (māl'n-trĭsh'ən)  Pronunciation Key 
Poor nutrition caused by an insufficient, oversufficient, or poorly balanced diet or by a medical condition, such as chronic diarrhea, resulting in inadequate digestion or utilization of foods.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

malnutrition definition


Inadequate nutrition caused by the lack of a balanced diet or by disorders of the digestive system in which the nutrients from food cannot be absorbed properly.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Their nutrition crisis takes the form of malnutrition, in too many cases acute
  malnutrition.
The scientists found evidence of a number of diseases that are related to
  maternal malnutrition and poor prenatal care.
The food stamp program was originally devised to combat malnutrition among the
  poor.
These conditions are responsible for a lack of food, which leads to
  malnutrition.
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