Source : Webster's Revised Unabridged Dictionary (1913)

Lemur \Le"mur\ (l[=e]"m[u^]r), n. [L., a ghost, specter. So
   called on account of its habit of going abroad by night.]
   (Zo["o]l.)
   One of a family ({Lemurid[ae]}) of nocturnal mammals allied
   to the monkeys, but of small size, and having a sharp and
   foxlike muzzle, and large eyes. They feed upon birds,
   insects, and fruit, and are mostly natives of Madagascar and
   the neighboring islands, one genus ({Galago}) occurring in
   Africa. The slow lemur or kukang of the East Indies is
   {Nycticebus tardigradus}. See {Galago}, {Indris}, and
   {Colugo}.

Source : WordNet®

lemur
     n : large-eyed arboreal prosimian having foxy faces and long
         furry tails