Fissure in Latin means Fissura it is a type of a cleft, deep furrow, groove or a natural division that is found in the brain. A fissure can also be found in the liver and the spinal cord. It can also refer to a tear that can affect the anus; this type of a fissure is known as an anal fissure. In the terms of dentistry a fissure can refer to a break that is found mainly in the enamel of the tooth. In the geological term a fissure stands for the cracks that are found in the rocks or on the surface of the earth. It can also refer to a small narrow crack or an opening in the rock formation of the earth.