Black-jack
Pronunciation : Black"-jack`
Part of Speech : n.
Definition : 1. (Min.)
Defn: A name given by English miners to sphalerite, or zinc blende; - - called also false galena. See Blende.
2. Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc.
3. A large leather vessel for beer, etc. [Obs.]
4. (Bot.)
Defn: The Quercus nigra, or barren oak.
5. The ensign of a pirate.
Source : Webster's Unabridged Dictionary, 1913