Fissure: A cleft or groove. A fissure can be normal or abnormal.
A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain wall.
A fissure in the anus is distinctly abnormal. It is a painful crack in the edge of the anus and is very painful. Also called an anal fissure or fissure in ano.
Library > Literature & Language > Dictionary ( fÄsh ' É™r ) n. A long narrow opening; a crack or cleft. The process of splitting or separating; division. A ...
fissure /fisÂ·sure/ (fishÂ´er) 1. any cleft or groove, normal or otherwise, especially a deep fold in the cerebral cortex involving its entire thickness.
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Definition of FISSURE. 1: a narrow opening or crack of considerable length and depth usually occurring from some breaking or parting . 2. a: a natural cleft between ...
Learn about an anal fissure (fissures), painful condition in which a cut or tear occurs in the anus. Symptoms include rectal bleeding, anal itching, and painful urination.