diminution

nouns

change toward something smaller or lower
decline, diminution
is derived from
diminish
the statement of a theme in notes of lesser duration (usually half the length of the original)
diminution
antonym
augmentation
is a type of (narrower)
(music) the presentation of a musical theme
"the initial statement of the sonata"
statement
the act of decreasing or reducing something
decrease, diminution, reduction, step-down