البِخَاعُ

A certain vein, or nerve, (عِرْق,) in the صُلْب [or back-bone], (Z in the Fáïk and Ksh, and K,) lying within the قَفَا [or back of the neck]; (Z in the Ksh, and TA;) Bd says, lying within the فَقَار [or vertebræ]; but it is said that this is a mistranscription, and that the right reading is the قفا, as in the Ksh; and it is said in the K to be running into the bone [or, as in the CK, bones,] of the neck; but this is a mistake: (TA:) according to an assertion of Z, (K,) in his Fáïk and Ksh, (TA,) it is different from the نُخَاع, with ن, which is the white cord in the interior of the bone of the neck, extending to the back-bone: but IA th says, I have searched long in lexicons, and in books of medicine and anatomy, but have not found البخاع, with ب, mentioned in any of them. (TA.)