一切經音義 2.34

2.34

Brain and membranes (腦膜: the upper character is nai + dao fan. The Shuowen jiezi writes it as 𦠒: the marrow in the head; it takes the flesh signific and zai phonetic. There are those who write it as 𮌢, 𦠊, or 腦, all of which are incorrect; [the phonetic component] has the same pronunciation as above. The lower character is pronounced mo. The Zitong says: what is inside the skin and outside the flesh is called a membrane. The Shuowen jiezi says: the intermuscular membranes between flesh. 胲 is gu + ai fan).