noun (plural diastemata /-mətə/)
1A gap between the teeth, in particular.
- 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.
- 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.
Mid 19th century: via late Latin from Greek diastēma 'space between'.
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