noun Medicine/Medical.
the injection of a fluid into the rectum to cause a bowel movement.
the fluid injected.
Also called enema bag. a rubber bag or other device for administering an enema.

1675–85; < Late Latin < Greek: injection, equivalent to en- en-2 + (h)e- (stem of hiénai to throw) + -ma noun suffix

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World English Dictionary
enema (ˈɛnɪmə)
n , pl -mas, -mata
1.  the introduction of liquid into the rectum to evacuate the bowels, medicate, or nourish
2.  the liquid so introduced
[C15: from New Latin, from Greek: injection, from enienai to send in, from hienai to send]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1681, from Gk. enema "injection," from enienai "to send in, inject," from en- "in" + hienai "send" (cognate of L. jacere).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

enema en·e·ma (ěn'ə-mə)
n. pl. en·e·mas

  1. The injection of liquid into the rectum through the anus for cleansing, for stimulating evacuation of the bowels, or for other therapeutic or diagnostic purposes.

  2. The fluid so injected.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Physical cleansing, such as using enemas, does not have an appreciable effect
  on your intestinal flora.
He scoffed at attempts to probe his mind, and was convinced that the medical
  staff had an unhealthy obsession about enemas.
If constipation or fecal impaction contributes to fecal incontinence, usually
  laxatives and enemas are of little help.
They go to two different spas that feature enemas and spiritual cleansing.
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