Meaning of musica ficta

mu•si•ca fic•ta

Pronunciation: (my'zi-ku fik'tu Lat. m'si-kä&sec fik'tä), [key]
  1. the use of chromatically altered tones in the contrapuntal music of the 10th to the 16th centuries.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.