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

Nearby words

  1. bluegrass region,
  2. bluegrass state,
  3. bluehead,
  4. blueing,
  5. blueish,
  6. bluejacket,
  7. bluejacking,
  8. blueline,
  9. bluely,
  10. blueness

Origin of bluejack

1855–60, Americanism; blue + jack1, modeled after blackjack; so called from the bluish look of the leaves

Also called bluejack oak. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019