一切經音義 5.28

5.28

腦膜（上乃倒反說文云頭中髓也古文作𱑄或作[甾-十+乂]又作[女*(巢-果+(离-禸))]𢙉謬也說文從肉[甾-十+乂]聲下忙博反說文云頭間膜也字統云皮內肉外為之膜從肉莫聲）。

Brain and membrane (腦膜): The first character is read with the fanqie 乃 + 倒. The Shuowen says: 'The marrow within the head.' In ancient script it is written as 𱑄, or as [甾-十+乂], or also as [女*(巢-果+(离-禸))] or 𢙉, which are erroneous. The Shuowen has it deriving from 肉 with [甾-十+乂] providing the phonetic. The second character is read with the fanqie 忙 + 博. The Shuowen says: 'The membrane inside the head.' The Zitong says: 'What lies inside the skin and outside the flesh is called 膜. It derives from 肉 with 莫 providing the phonetic.'