An unprepared, non-harmonic note which does not belong to the chord on the strong beat. Approached by leap and resolves downwards or upwards by step (sometimes by leap) into the chord. In contrast, suspensions are prepared (not approached by leap) and never resolve by leap. Appoggiatura may be shown as an ornament or may be absorbed in the ordinary notation (nineteenth century). When there are two appoggiaturas on the same beat, it is called double appoggiatura. For a triple appoggiatura, see b.181 of the first movement of Beethoven's String Quartet Op.18, No.1).