What is "White Fang" in the title of the book of the same name?

White Fang is a novel by American author Jack London (1876–1916) — and the name of the book's eponymous character, a wild wolfdog. First serialized in Outing magazine between May and October 1906, it was published in book form in October 1906. The story details White Fang's journey to domestication in Yukon Territory and the Northwest Territories during the 1890s Klondike Gold Rush. It is a companion novel (and a thematic mirror) to London's best-known work, The Call of the Wild (1903), which is about a kidnapped, domesticated dog embracing his wild ancestry to survive and thrive in the wild.

Source: Wikipedia