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Webster 1913 Edition
Slickensides
Slick′en-sidesˊ
,Noun.
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.
Webster 1828 Edition
Slickensides
SLICK'ENSIDES
,Noun.