verb (used without object), expectorated, expectorating.
to eject or expel matter, as phlegm, from the throat or lungs by coughing or hawking and spitting; spit.
verb (used with object), expectorated, expectorating.
to eject or expel (matter) in this way.

1595–1605; < Latin expectorātus (past participle of expectorāre to expel from the breast), equivalent to ex- ex-1 + pector- (stem of pectus) breast + -ātus -ate1

expectorator, noun
unexpectorated, adjective
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World English Dictionary
expectorate (ɪkˈspɛktəˌreɪt)
to cough up and spit out (sputum from the respiratory passages)
[C17: from Latin expectorāre, literally: to drive from the breast, expel, from pectus breast]

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

c.1600, "to clear out the chest or lungs," from L. expectoratus, pp. of expectorare "scorn, expel from the mind," lit. "make a clean breast," from ex- "out" + pectus (gen. pectoris) "breast." Use as a euphemism for "spit" is first recorded 1827. Original sense in expectorant. Related: Expectorated; expectorating;
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

expectorate ex·pec·to·rate (ĭk-spěk'tə-rāt')
v. ex·pec·to·rat·ed, ex·pec·to·rat·ing, ex·pec·to·rates

  1. To eject saliva, mucus, or other body fluid from the mouth; spit.

  2. To clear out the chest and lungs by coughing up and spitting out matter.

ex·pec'to·ra'tion n.
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
Collect expectorate from a deep cough only when transtracheal aspiration, tracheal aspiration, or washings are unavailable.
The old smoker has usually some increase of this secretion, although he does not expectorate.
Sputa should be induced in persons unable to expectorate spontaneously.
With saliva, all a patient has to do is expectorate.
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