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a crack in a lip caused usually by cold
a narrow opening as e.g. between planks in a wall
a deep fissure
a crack in metal resulting from metal fatigue
break, fault, faulting, fracture, geological fault, shift
(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
a narrow fissure in rock
a narrow fissure
a lengthwise crack in wood
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
a geological fault in which one side is above the other
a geological fault in which one of the adjacent surfaces appears to have moved horizontally