A small carnivorous mammal of the Old World that resembles a weasel, Martes zibellina, from cold regions in Eurasia and the North Pacific islands, valued for its dark brown fur (Wikipedia).
User Defined Definitions
"an artist's brush made of sable hairs"
"the expensive dark brown fur of the marten"
"a very dark black"
"marten of northern Asian forests having luxuriant dark brown fur"