What is "morinda citrifolia"

morindin \mo*rin"din\, n. (Chem.) A yellow dyestuff ( C27H30O14) extracted from the root bark of an East Indian plant ( Morinda citrifolia) or from the bark of Coprosma australis. The substance is also found in the fruit of the Morinda citrifolia, called noni, which is touted by some merchants to have a stimulatory effect on the immune system. It is a disaccharide derivative of anthracenedione.

Morinda citrifolia is a tree in the coffee family, Rubiaceae. Its native range extends through Southeast Asia and Australasia, and the species is now cultivated throughout the tropics and widely naturalised.

English common names include great morinda, Indian mulberry, noni, beach mulberry, and cheese fruit.