WordReference Random House Unabridged Dictionary of American English © 2025
blue′ jack′.
blue•jack (blo̅o̅′jak′),USA pronunciation n.
- FishSee coho salmon.
blue•jack (blo̅o̅′jak′),USA pronunciation n.
- Plant Biologya small oak, Quercus incana, of the southern U.S., having crooked branches and blue-green leaves. Also called blue′jack oak′.
- 1855–60, American; blue + jack1, modeled after blackjack; so called from the bluish look of the leaves
'blue jack' also found in these entries (note: many are not synonyms or translations):