noun (plural diastemata)Zoology
1A 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.
- 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.
1.1A gap between a person’s two upper front teeth.
Mid 19th century: via late Latin from Greek diastēma 'space between'.
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