Definition of black vomit in US English:

black vomit

noun

  • 1Vomit containing dark material; specifically blood altered by gastric fluid. In early use also (as a count noun): †an episode of vomiting such material (obsolete).

  • 2The disease yellow fever, in which the vomiting of blood is often a prominent symptom. Now historical.

Origin

Early 17th century; earliest use found in Helkiah Crooke (1576–1648), physician and anatomist. From black + vomit. In sense 1 after post-classical Latin vomitus niger.

Pronunciation

black vomit

/ˌblak ˈvɒmɪt/