The Collaborative International Dictionary of English v.0.48:

Museum \Mu*se"um\, n. [L., a temple of the Muses, hence, a place
   of study, fr. Gr. ?, fr. ? a Muse.]
   A repository or a collection of natural, scientific, or
   literary curiosities, or of works of art.
   [1913 Webster]

   Museum beetle, Museum pest. (Zool.) See Anthrenus.
      [1913 Webster]