fissure

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fissure

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

fissure

[′fish·ər]
(geology)
A high, narrow cave passageway.
An extensive crack in a rock.
(metallurgy)
A small cracklike discontinuity with a slight opening or displacement of the fracture surfaces.
References in periodicals archive ?
Three vertical portal fissures and three horizontal portal fissures were observed.
Radiological and corrosion cast studies have attributed the formation of sulci to existence of weak zone of hepatic parenchyma, represented by portal fissures between adjacent sagittal portal territories.