A long, narrow crack or opening made by breaking or splitting, especially in rock or earth.
A groove, deep furrow, elongated cleft or tear between body parts or in the substance of an organ; a sulcus.
A break or slit in tissue usually at the junction of skin and mucous membrane.
A state of incompatibility or disagreement.
To split, forming fissures.
A deep narrow valley or gorge in the earth's surface worn by running water.