noun, plural (especially collectively) yel·low jack, (especially referring to two or more kinds or species) yel·low jacks for 3.
- Informal. quarantine flag.
- Pathology. yellow fever.
- any carangoid fish, especially a Caribbean food fish, Caranx bartholomaei.
noun
- pathol another name for yellow fever
- another name for quarantine flag
- any of certain large yellowish carangid food fishes, esp Caranx bartholomaei, of warm and tropical Atlantic waters