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 ?
CT scan of the head showed diffuse sulcal effacement, obliterated basal cisterns, and hyperdensity in the interhemispheric fissure suggestive of SAH (Figure 2).
* Transfrontal: interhemispheric fissure, frontal cortex in front of lateral ventricles, orbita, sphenoid
The impression of her head CT revealed a right subdural hematoma with mass effect and a blood interhemispheric fissure, which may have represented a subdural interhemispheric collection of subarachnoid blood.

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