fissure(redirected from anterior median fissure)
Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to anterior median fissure: posterior median sulcus
1. Anatomy a narrow split or groove that divides an organ such as the brain, lung, or liver into lobes
2. a small unnatural crack in the skin or mucous membrane, as between the toes or at the anus
3. a minute crack in the surface of a tooth, caused by imperfect joining of enamel during development
A high, narrow cave passageway.
An extensive crack in a rock.
A small cracklike discontinuity with a slight opening or displacement of the fracture surfaces.