Ermine refers to the winter coat of the stoat, a small mammal belonging to the weasel family. During winter, the stoat's fur changes from brown to white, providing camouflage in snowy environments. The tail often retains a black tip, which is a distinguishing feature of the ermine. Historically, ermine fur has been highly valued and is often associated with royalty and nobility. It has been used in clothing, robes, and ceremonial garments, symbolizing wealth and status. The term "ermine" is also used to describe the fur itself, which is soft and luxurious.