1. 
   Retching
   Retching (also known as dry heaving) is the reverse movement (peristalsis) of the stomach and esophagus without vomiting. The retching phase is characterized by a series of violent spasmodic abdomino-thoracic contractions with the glottis closed. During this time the inspiratory movements of the ch...
   Found op http://en.wikipedia.org/wiki/Retching
   
   
2. 
   retching
   Gastric and oesophageal movements of vomiting without expulsion of vomitus. ... Synonym: dry vomiting, vomiturition. ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?retching
   
   
3. 
   retching
   (rech´ing) a strong involuntary effort to vomit.
   Found op http://www.encyclo.co.uk/local/21001
   
   
4. 
   Retching
   • (p. pr. & vb. n.) of Retch
   Found op http://thinkexist.com/dictionary/meaning/retching/
   
   
5. 
   retching
   Type: Term Pronunciation: rech′ing Definitions: 1. Gastric and esophageal movements of vomiting without expulsion of vomitus. Synonyms: dry vomiting, vomiturition
   Found op http://www.medilexicon.com/medicaldictionary.php?t=77778
   
   
6. 
   RETCHING
   Abdominal contractions in preparation for vomiting.
   Found op http://www.thehorse.com/Glossary.xhtml?L=R
   
   

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