A sharp flattened chisel-shaped tooth in mammals that is adapted for biting food and—in rodents—for gnawing. In humans there are normally two pairs of incisors (central and lateral) in each jaw. See permanent teeth.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。