ambergris
Also Known As:
Ambra grisea, Ambre gris, ambergrease, or grey amber
What it is:
Additive
Further reading:
http://en.wikipedia.org/wiki/Ambergris
A solid, waxy, flammable substance of a dull gray or blackish color produced in the digestive system of and regurgitated by sperm whales. Freshly produced ambergris has a marine, fecal odor. However, as it ages, it acquires a sweet, earthy scent commonly likened to the fragrance of rubbing alcohol without the vaporous chemical astringency. The principal historical use of ambergris was as a fixative in perfumery, though it has now been largely displaced by synthetics.