noun Pathology.
the expectoration of blood or bloody mucus.

1640–50; < Neo-Latin, equivalent to hemo- hemo- + Greek ptýsis spitting; compare ptýein to spit

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World English Dictionary
haemoptysis or (US) hemoptysis (hɪˈmɒptɪsɪs)
n , pl -ses
Compare haematemesis spitting or coughing up of blood or blood-streaked mucus, as in tuberculosis
[C17: from haemo- + -ptysis, from Greek ptyein to spit]
hemoptysis or (US) hemoptysis (hɪˈmɒptɪsɪs, -ˌsiːz)
[C17: from haemo- + -ptysis, from Greek ptyein to spit]

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

hemoptysis he·mop·ty·sis (hĭ-mŏp'tĭ-sĭs)
The spitting of blood derived from the lungs or from the bronchial tubes.

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
Cystic fibrosis pulmonary guidelines: pulmonary complications: hemoptysis and pneumothorax.
Hemoptysis is one of the serious complication of many pulmonary diseases.
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