BLACK'ISH, adjective Somewhat black; moderately black or dark. BLACK'-JACK, A name given by miners to blend, a mineral called also false galena, and blend. It is an ore of zink, in combination with iron and sulphur, sulfuret of zink. 1. A leathern cup of old times.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI