slickenside noun. ['slɪk(ǝ)nsʌɪd] M18.
[from dial. var. of SLICK adjective + SIDE noun.]
1. Mineralogy. A specular variety of galena found in Derbyshire. Now rare or obsolete. M18.

2. Geology. A polished and freq. striated surface that results from friction along a fault or bedding plane. E19.

■ slickensided adjective (Geology) (of a rock surface) polished or striated by friction L19.

[TahlilGaran] English Dictionary ▲