Definition of Nachschlag in English:

Nachschlag

Pronunciation /ˈnɑːxʃlɑːɡ/

noun

Music
  • A grace note, the value of which is deducted from the value of the preceding note.

    Other similar ornaments are sometimes also given this name.

Origin

Late 19th century; earliest use found in George Grove (1820–1900), writer on music and lexicographer. From German Nachschlag a grace note from nach after + Schlag note, blow.