In music, DIM stands for Diminuendo/dim in strength and ACCEL stands for accelerando/accel in speed, both of which are terms in music.

other terms:

1, Grave (slow speed)

2, Largo (slightly slow speed)

3, Lento (slow speed)

4, Adagio (slow speed)

5. (slightly slower)

8, andantino

9, Moderato (medium speed)

1, Allegretto (slightly faster)

It includes not only the elements of music (such as speed, expression, strength, mode, harmony, melody, etc.), but also the periods and genres of music (such as medieval period, baroque period, classical period, The Romantic Period, national music school, etc.).

musical elements: bar, rhythm, beat, polyrhythm, pitch, timbre and sound value.

Baidu encyclopedia-music terms