acciaccatura Meaning, Definition & Usage

  1. noun an embellishing note usually written in smaller size
    grace note; appoggiatura.

WordNet

Ac*ciac`ca*tu"ra noun
Etymology
It., from acciaccare to crush.
Definitions
  1. (Mus.) A short grace note, one semitone below the note to which it is prefixed; -- used especially in organ music. Now used as equivalent to the short appoggiatura.

Webster 1913