The Collaborative International Dictionary of English v.0.48:

Melanure \Mel"a*nure\, n. [NL. melanurus, fr. Gr. me`las,
   me`lanos, black + o'ura` tail.] (Zool.)
   A small fish of the Mediterranean; a gilthead. See Gilthead
   (a) .
       [1913 Webster]