drift mine
noun
a mine the opening of which is dug into an outcrop of coal or ore.
an underground placer mine.
Origin of drift mine
An Americanism dating back to 1885–90
Words nearby drift mine
drift anchor,
drift angle,
drift ice,
drift indicator,
drift lead,
drift mine,
drift net,
drift netter,
drift transistor,
drift tube,
driftage