yellow jack

/ˌjɛloʊ dʒæk/

Definitions of yellow jack

1. noun

   caused by a flavivirus transmitted by a mosquito
   synonyms: black vomit, yellow fever

   type of:

   infectious disease

   a disease transmitted only by a specific kind of contact
2. noun

   yellow flag hoist on a ship in quarantine
   type of:

   flag

   emblem usually consisting of a rectangular piece of cloth of distinctive design
3. noun

   fish of western Atlantic and Gulf of Mexico
   synonyms: Caranx bartholomaei

   type of:

   jack

   any of several fast-swimming predacious fishes of tropical to warm temperate seas