请输入您要查询的英文单词:

 

单词 diastema
释义

Definition of diastema in English:

diastema

nounPlural diastemata ˌdʌɪəˈstiːmədʌɪˈastɪməˌdaɪəˈstimə
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.

    Example sentencesExamples
    • The canines are absent or vestigial, and a substantial diastema separates incisors and cheek teeth.
    • 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.
    • As in the traversodonts, a large gap - the diastema - separated the incisors from the square cheek teeth (seven on each side).
    • If a horse has a narrower diastema, a smaller or flatter palate, and/or a fat or thick tongue, a thinner bit may be far more comfortable in that horse's mouth than a thick one.
    1. 1.1 A gap between a person's two upper front teeth.

Origin

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

 
 

Definition of diastema in US English:

diastema

nounˌdīəˈstēməˌdaɪəˈstimə
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.

    Example sentencesExamples
    • The canines are absent or vestigial, and a substantial diastema separates incisors and cheek teeth.
    • 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.
    • If a horse has a narrower diastema, a smaller or flatter palate, and/or a fat or thick tongue, a thinner bit may be far more comfortable in that horse's mouth than a thick one.
    • 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. 1.1 A gap between a person's two upper front teeth.

Origin

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

 
 
随便看

 

英语词典包含464360条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/23 13:42:12