Definition of yellow jack in English:
Archaic term for yellow fever.
- Yellow fever (also called yellow jack, black vomit or sometimes American Plague) is an acute viral disease.
- Not even inland towns were safe from the fever known as yellow jack.
- Yellow fever, also known as yellow jack for the quarantine flag flown by ships at sea, became one of the most feared diseases throughout urban America.
Definition of yellow jack in:
- US English dictionary
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