Black-jack

Black·-jack

Black-jack

n.
  1. A name given by English miners to sphalerite, or zinc blende; -- called also false galena. See Blende. (Min.)
  2. Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc.
  3. A large leather vessel for beer, etc. [Obs.]
  4. The Quercus nigra, or barren oak. (Bot.)
  5. The ensign of a pirate.