Dictionary
yel'low jack"
—pl. (esp. collectively) jack, (esp. referring to two or more kinds or species) jacks for 3.
1. Informal.See
quarantine flag.
2. Pathol.See
yellow fever.
3. any carangoid fish, esp. a Caribbean food fish,
Caranx bartholomaei.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.