SG Heritage Dictionary

Slickensides [Noun] Webster's Dictionary 1828

A name which workmen give to a variety of galena in Derbyshire.

Slickensides [Noun] Webster's Dictionary 1913

1. The smooth, striated, or partially polished surfaces of a fissure or seam, supposed to have been produced by the sliding of one surface on another.

2. A variety of galena found in Derbyshire, England.