[ bloo-jak ]
/ ˈbluˌdʒæk /


a small oak, Quercus incana, of the southern U.S., having crooked branches and blue-green leaves.
Also called bluejack oak .

Origin of bluejack

1855–60, Americanism;blue + jack1, modeled after blackjack; so called from the bluish look of the leaves Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020