Marking nut

Related to Marking nut: Semecarpus anacardium
(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.

See also: Marking

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.