Linguistics the observation that certain Indo-European consonants (mainly stops) undergo regular changes in the Germanic languages which are not seen in others such as Greek or Latin. Examples include p becoming f so that Latin pedem corresponds to English foot and German Fuss. The principle was set out by Jacob Grimm in his German grammar (2nd edition, 1822).
【语言学】格林定律（关于印欧语系中的一些辅音［主要为塞音］在日耳曼语中的演变规律, 而在诸如希腊及拉丁语等同语系语言中却无此演变, 如 p变为 f, 因此拉丁语中的 pedem对应着英语的foot和德语的Fuss; 此定律由雅各布·格林在其《德语语法》［第二版, 1822］中提出）。