mus·te·line (mŭs'tə-līn', -lĭn) adj. Of, relating to, or belonging to the Mustelidae, the family of fur-bearing mammals that includes the badger, mink, otter, and weasel.
[Latin mūstēlīnus, of a weasel, from mūstēla, weasel, probably from mūs, mouse; see mūs- in Indo-European roots.]