المِسْكَبَةُ

[altered in a copy of the A from المَسْكَبَةُ, which may perhaps be the right word,] The higher, or highest, rivulet, or small channel for irrigation, from which the other rivulets, or small channels, are supplied with water. (A.)

[In a copy of the A (in article سطب), المَسْطَبَة, which I believe to be in that instance a mistranscription for المسكبة, occurs explained as meaning (assumed tropical:) The Milky Way.]