Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of black-jack is as below...

Black-jack :: Black-jack (n.) A name given by English miners to sphalerite, or zinc blende; -- called also false galena. See Blende..

Black-jack :: Black-jack (n.) A large leather vessel for beer, etc..

Sphalerite :: Sphalerite (n.) Zinc sulphide; -- called also blende, black-jack, false galena, etc. See Blende (a)..

Black-jack :: Black-jack (n.) The ensign of a pirate.

Black-jack :: Black-jack (n.) Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc..

Black-jack :: Black-jack (n.) The Quercus nigra, or barren oak..

Blende :: Blende (n.) A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous..

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