premolar
noun [ C ] anatomy uk/ˌpriːˈməʊ.lər/ us/ˌpriːˈmoʊ.lɚ/
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）
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)