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.

• 龙涎香抹香鲸肠部形成的一种蜡状灰色物质，常浮在海面或被冲到岸上。加入香水中以减缓挥发速度