a grayish, waxy substance from the intestines of sperm whales, often found floating in tropical seas: used in some perfumes
See ambergris in American Heritage Dictionary 4
(ămˈbər-grĭsˌ, -grēsˌ)
noun
A waxy grayish substance formed in the intestines of sperm whales and found floating at sea or washed ashore. It is added to perfumes to slow down the rate of evaporation.