I. ˈslikənˌsīd noun
Etymology: English dialect slicken smooth (alteration of slick ) (II) + side
: a smooth striated polished surface produced on rock by movement along a fault, a subsidiary fracture, a bedding plane, or at the bottom of a landslide — usually used in plural
interpretation of the relative age of the faulting, on the basis of slickensides alone, is difficult — J.D.Forrester
II. transitive verb
( -ed/-ing/-s )
: to form slickensides upon