ambergrises

Science Dictionary
ambergris   (ām'bər-grĭs', -grēs')  Pronunciation Key 
A yellow, gray, or black waxy material formed in the intestines of sperm whales that consists of a mixture of steroid derivatives. It is often found floating at sea or washed ashore, has a pleasant odor, and is added to perfumes as a fixative to slow down the rate of evaporation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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