Source : Webster's Revised Unabridged Dictionary (1913)

Muset \Mu"set\, n. [OF. mussette, dim. of musse, muce, a hiding
   place, fr. F. musser, OF. mucier, muchier, to conceal, hide.
   Cf. {Micher}.]
   A small hole or gap through which a wild animal passes; a
   muse. --Shak.