oboe d'amore
    n 1: an oboe pitched a minor third lower than the ordinary oboe;
         used to perform baroque music

Oboe \O"boe\, n. [It., fr. F. hautbois. See Hautboy.] (Mus.)
   One of the higher wind instruments in the modern orchestra,
   yet of great antiquity, having a penetrating pastoral quality
   of tone, somewhat like the clarinet in form, but more
   slender, and sounded by means of a double reed; a hautboy.
   [1913 Webster]

   Oboe d'amore [It., lit., oboe of love], and Oboe di
   caccia [It., lit., oboe of the chase], are names of obsolete
      modifications of the oboe, often found in the scores of
      Bach and Handel.
      [1913 Webster]