资料来源 : Webster's Revised Unabridged Dictionary (1913)

Marking \Mark"ing\, n.
   The act of one who, or that which, marks; the mark or marks
   made; arrangement or disposition of marks or coloring; as,
   the marking of a bird's plumage.

   {Marking ink}, indelible ink, because used in marking linen.
      

   {Marking nut} (Bot.), the nut of the {Semecarpus Anacardium},
      an East Indian tree. The shell of the nut yields a
      blackish resinous juice used for marking cotton cloth, and
      an oil prepared from it is used for rheumatism.

资料来源 : WordNet®

marking ink
     n : an indelible ink for marking clothes or linens etc.