| 词汇 | premolar |
| 释义 | premolar noun[ C ] anatomyuk /ˌpriːˈməʊ.lər/ us /ˌpriːˈmoʊ.lɚ/ one of the two teeth immediately in front of the molars on both sides of the upper and lower jaws of humans and some other animals, used for grinding and chewing food (= crushing it with the teeth)前臼齿（位于人类和一些动物的上下颌两则，臼齿前紧邻的两颗牙齿，用于磨碎、咀嚼、压碎食物） alex-mit/iStock/Getty Images Plus/Getty Images /GettyImages The teeth baby tooth buck-toothed cementum centric cingulum coronal erupt hydroxyapatite interdental labially lingually mesially milk tooth molar pulp cavity pulpal rictus snaggle-toothed snaggled wisdom tooth Examples of premolarpremolar Results showed that supernumerary teeth only occurred in the postcanine (molars and premolars) tooth row. All of these are gradually replaced with a permanent counterpart except for the primary first and second molars; they are replaced by premolars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Usually the mesiobuccal cusp rests in between the first mandibular molars and second premolars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It is, however, identified by having shortened upper premolars, enlarged caniniform upper third incisors, as well as reduced upper molars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The premolars and molars are at the back of the mouth. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A horse's incisors, premolars, and molars, once fully developed, continue to erupt throughout its lifetime as the grinding surface is worn down through chewing. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The upper molars extend onto the zygomatic arch and are considerably smaller than their neighbouring premolars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The complete dental formula was not recoverable, but the lower jaw contained 4 incisors, 1 canine, 5 premolars, and 6 molars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Despite being named molars, the deciduous molars are followed by permanent premolars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Triangular ridges are those that project from the cusp tips of premolar and molars to the central groove. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Extracting the first primary molars only this approach produces the earlier eruption of first premolars but reduces the rapidity and amount of incisor alignment. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Fewer teeth that were primarily slicing premolars and not crushing molars meant that grass or anything with cellulose would not have been on the menu. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Since there are no premolars in the primary dentition, the primary molars are replaced by permanent premolars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All horses have twelve premolars, twelve molars, and twelve incisors. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Rabbits have a total of 6 incisors, three upper premolars, three upper molars, two lower premolars, and two lower molars on each side. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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