dehydration

[dee-hahy-drey-shuhn]
noun
1.
the act or process of dehydrating.
2.
an abnormal loss of water from the body, especially from illness or physical exertion.

Origin:
1850–55; dehydrate + -ion

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World English Dictionary
dehydrate (diːˈhaɪdreɪt, ˌdiːhaɪˈdreɪt)
 
vb
1.  to lose or cause to lose water; make or become anhydrous
2.  to lose or cause to lose hydrogen atoms and oxygen atoms in the proportions in which they occur in water, as in a chemical reaction
3.  to lose or deprive of water, as the body or tissues
 
dehy'dration
 
n
 
de'hydrator
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

dehydration de·hy·dra·tion (dē'hī-drā'shən)
n.

  1. Excessive loss of water from the body or from an organ or a body part, as occurs during illness or fluid deprivation.

  2. The process of removing water from a substance or compound.

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
dehydration   (dē'hī-drā'shən)  Pronunciation Key 
  1. The process of losing or removing water or moisture.

  2. A condition caused by the excessive loss of water from the body, which causes a rise in blood sodium levels. Since dehydration is most often caused by excessive sweating, vomiting, or diarrhea, water loss is usually accompanied by a deficiency of electrolytes. If untreated, severe dehydration can lead to shock.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

dehydration definition


The removal of water; in chemistry, the loss of two hydrogen atoms for every oxygen atom (see H<sub>8</sub>O).

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
Dehydration means your body does not have as much water and fluids as it should.
For many people, a feeling of thirst only becomes apparent after significant
  dehydration.
Delusions were setting in because of dehydration and hypothermia.
For example, alcohol inhibits antidiuretic hormone, which leads to excessive
  urination and dehydration.
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