Definition of diastema in English:

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Pronunciation: /ˌdīəˈstēmə/

noun (plural diastemata /-mətə/)

1A gap between the teeth, in particular.
Example sentences
  • The length of p2 is 45 mm, and its width 14 mm; it is followed by a diastema of 23 min.
  • They both sport shag hairdos and suffer from mild cases of diastema.
  • Coleman was so much cuter with his diastema, but no, he had to undergo some dental procedure to remove his gap. "I'd rather see the gap," Castro said.
1.1 Zoology A space separating teeth of different functions, especially that between the biting teeth (incisors and canines) and grinding teeth (premolars and molars) in rodents and ungulates.
Example sentences
  • As in the traversodonts, a large gap - the diastema - separated the incisors from the square cheek teeth (seven on each side).
  • Incisors and canines are absent, but the anterior cheek teeth are enlarged, triangular in cross section, and canine-like. They are separated from the rest of the cheek teeth by a diastema.
  • The bit sits in a part of the horse's mouth called the diastema, which is a section devoid of teeth that lies between the front incisors and the back pre-molars and molars.
1.2A gap between a person’s two upper front teeth.


Mid 19th century: via late Latin from Greek diastēma 'space between'.

For editors and proofreaders

Syllabification: di·a·ste·ma

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