slot(LONG HOLE)
medical specialized
a long, deep, narrow hollow area in a surface in the body, especially in the cerebral cortex (= the surface of the brain)（大脑皮层等的）裂纹，沟
medical specialized
a fault on the surface of a tooth（牙齿表面的）裂;疵点

SMART Vocabulary: related words and phrases

Geography: caves, cracks & crevices
cave
cavern
chimney
crack
crater
cratered
crevasse
crevice
furrow
gouge
grotto
gulf
hole
pit
pothole
relocation
rut
rutty
speleologist
stalagmite

You can also find related words, phrases, and synonyms in the topics:

Substances & structures in the body
Holes, hollows and dips
Problems with bones, joints & teeth

fissure | American Dictionary

fissure
noun[ C ]
us/ˈfɪʃ·ər/
a deep crack, esp. one in rock or ice or in the ground

Examples of fissure

fissure
The traditional scaling means that the square of the fissure thickness is of the same order as the permeability coefficient of the matrix set.
The embryonic fissure, which reaches the peripheral retina at the ventral-nasal aspect of the eye, was used as a landmark.
The other fissures have been destroyed by quarrying operations.
The upper and lower parts of some fissure fills were also obscured by quarry scree.
This process creates vesicles and fissures as near- and sub-surface pockets of these minerals volatilize.
Various fragments of both sculptures showed evidence of fissures and breakages, some of which appear to have been produced by contact with fire.
But this attempt fizzled, undermined by internal fissures and regional pressures that still preclude a strong central state.
For some permeability ratios and fissure widths, the large-scale description is achieved by introducing the so-called double porosity model.
Some fissure-fills contain angular fragments of wall-rock that can be matched to the adjacent margin.
The reptiles and mammals found in the fissure deposits are found, most frequently, in the form of numerous disarticulated skeletal elements.
Some smaller cavities, or larger cavities with restricted access to the unconformity, were apparently filled by sediment that trickled down into the fissure system.
However, a significant amount of extension is still represented by the sediment-filled fissures.
These changes opened up a series of structural fissures and internal conflicts.
In the model under consideration, the width of the fissure is much smaller than the dimension of the adjacent block.
The relative importance of the various trends through time can be illustrated by plotting the total thickness of fissures containing a particular fill-type against dipdirection.
See all examples of fissure
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