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fissure (cleft)
1) A deep furrow, cleft or slit.
2) In dentistry, a developmental break or fault in the tooth enamel.
Related
sulcus
Specific
calcarine fissure (sulcus)
cleft palate
dermal fissure
horizontal fissure of right lung (transverse or minor fissure)
interpalpebral fissure
longitudinal cerebral fissure
oblique fissure of lung (major fissure)
petrooccipital/Ecker fissure
porta hepatis
rima
superior orbital fissure (sphenoidal formamen)
References
Stedman's Medical Dictionary 26th ed, Williams &
Wilkins, Baltimore, 1995