noun Pathology.

1870–75; < Neo-Latin < Greek émesis a vomiting, equivalent to eme- (stem of emeîn to vomit) + -sis -sis

hyperemesis, noun
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World English Dictionary
emesis (ˈɛmɪsɪs)
See vomit the technical name for vomiting
[C19: via New Latin from Greek, from emein to vomit]

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

1875, from Gk. emesis, from emein to vomit (see emetic).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

emesis em·e·sis (ěm'ĭ-sĭs)
n. pl. em·e·ses (-sēz')
The act or process of vomiting.

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
So far, my clues were high glucose and a plastic emesis basin.
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