diminuendo
adverb or adjective
di·min·u·en·do də-ˌmin-yə-ˈwen-(ˌ)dō 
-yü-ˈen-,
also -ˌmi-nə-ˈwen-
: decrescendo
diminuendo noun
Word History
Etymology
Italian, literally, diminishing, from Late Latin diminuendum, gerund of diminuere
First Known Use
1775, in the meaning defined above
Kids Definition
diminuendo
noun
di·min·u·en·do də-ˌmin-yə-ˈwen-dō
plural diminuendos
: decrescendo