Is “Diminuendo” a Scrabble word?
Yes
DIMINUENDO
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Diminuendo
/dɪˌmɪnjuːˈɛndəʊ/
noun
1.A dynamic mark directing that a passage is to be played gradually more softly
2.A passage having this mark
3.(metaphoric) The gradual dying away of something.
adjective
1.Describing a passage having this mark
adverb
1.Played in this style