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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Medical Dictionary

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

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