The Collaborative International Dictionary
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.
Wikipedia
Semecarpus anacardium (, Nepali:भलायो,Tibetan:གོ་བྱེ། ) is a native of India, found in the outer Himalayas to Coromandel Coast. It is closely related to the cashew.
Usage examples of "semecarpus anacardium".
The Oriental Anacardium or Cashew Nut (Semecarpus anacardium), a native of India, has similar qualities to the West Indian Cashew, and is said to contain an alkaloid called Chuchunine.