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Pronunciation: di'a-ste'ma, -ste'ma-ta


  1. Space between two adjacent teeth in the same dental arch.
  2. Fissure or abnormal opening in any part, especially if congenital.
  3. Cleft or space between the maxillary lateral incisor and canine teeth, into which the lower canine is received when the jaws are closed; abnormal in humans but normal in dogs and many other animals.

[G. diastema, an interval]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.