amber ambergris ambra ambra ambra grigia ambre gris ámbar gris âmbar cinza ćilibar άμπαρο ענבר אפור A waxy, odorous substance of marbled ashy color produced in the intestines of the sperm whale, and often found floating in tropical seas, or on the seashore. Formerly used as an ingredient in perfumery to prevent evaporation, more recently it has been replaced in this function by synthetic substances (AAT).