noun
a waxy substance produced in the intestines of sperm whales, often used in the manufacture of perfumes
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Ambergris is a waxy substance that originates from the digestive system of sperm whales.
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Did you know that some perfumes use ambergris as an ingredient?
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I heard that finding a piece of ambergris on the beach is like hitting the jackpot!
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His words were as rare and valuable as a piece of ambergris washed ashore.