Black-jack

n.	1.	(Min.) 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.
	4.	(Bot.) The Quercus nigra, or barren oak.
	5.	The ensign of a pirate.