Nonchord tone
The art of embellishment is the knowledge and use of musical ornamentation. This is an old art and many volumes have been written on this craft. Some ornaments[?] are the trill, mordent[?], arpeggio, and grace note.Ther are many, many others. Each nationality and historical period have used intrinsically specific ornamantation[?], thus, the embellishment of a J.S. Bach piece is more than likely not appropriate for a piece written by Chopin; this is for two reasons notwithstanding that the piano is to be used for the Chopin instead of the organ or harpsichord: Bach is a composer of the 18th century Baroque in Germany, and Chopin a Polish/French composer of the 19th century. Very different times, very different nationalities.