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The Collaborative International Dictionary
deep-mined

deep-mined \deep-mined\ adj. taken from an undergrround mine; -- as contrasted with coal obtained from a strip mine; as, deep-mined coal.

deep-mined

mined \mined\ adj. extracted from a source of supply as of minerals from the earth. [Narrower terms: deep-mined; exploited; strip-mined]

WordNet
deep-mined

adj. of coal, as contrasted with coal obtained from a strip mine; "deep-mined coal"

Usage examples of "deep-mined".

The position was that the President, the NSC, and State were all clamoring for deep-mined hypersecret intelligence from inside the heart of Baghdad, from the innermost councils of Saddam Hussein himself.