(Homonym: ferrate).
Domesticated albino variety of the European polecat bred for hunting rats and rabbits.
Domesticated variety of the Old World polecat.
About 35 cm/1.2 ft long, it usually has yellowish-white fur and pink eyes, but may be the dark brown color of a wild polecat.
Ferrets may breed with wild polecats. They have been used since ancient times to hunt rabbits and rats.

To search busily; SYN. grub.

An active and persistent searcher.

A narrow cotton, silk, or wool tape — called also ferreting.