BLACK-JACK
Black"-jack`, n.
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.
BLACK LEAD
Black` lead".
Defn: Plumbago; graphite.It leaves a blackish mark somewhat like lead. See Graphite.