The fruit of Myristica fragrans, it has a spicy sweet facet with earthy and more pungent base notes, and is used to provide an oriental spiciness that is subtler than the usual cinnamon-clove-vanilla bouquet of orientals, thus perfect for masculines and lighter woodies. 
The essential oil obtained by steam distillation of ground nutmeg is used widely in the perfumery and pharmaceutical industries. This volatile fraction typically contains 60-80% d-camphene by weight, as well as quantities of d-pinene,limonene, d-borneol, l-terpineol, geraniol, safrol, and myristicin.[6] In its pure form, myristicin is a toxin, and consumption of excessive amounts of nutmeg can result in myristicin poisoning.[7] The oil is colourless or light yellow, and smells and tastes of nutmeg. It contains numerous components of interest to the oleochemical industry, and is used as a natural food flavouring in baked goods, syrups, beverages, and sweets. It is used to replace ground nutmeg, as it leaves no particles in the food. The essential oil is also used in the cosmetic and pharmaceutical industries, for instance, in toothpaste, and as a major ingredient in some cough syrups. In traditional medicine, nutmeg and nutmeg oil were used for disorders related to the nervous and digestive systems.
After extraction of the essential oil, the remaining seed, containing much less flavour, is called "spent". Spent is often mixed in industrial mills with pure nutmeg to facilitate the milling process, as nutmeg is not easy to mill due to the high percentage of oil in the pure seed. Ground nutmeg with a variable percentage of spent (around 10% w/w) is also less likely to clot. To obtain a better running powder, a small percentage of rice flour also can be added.