accidental
US /ˌæk.səˈden.t̬əl/
UK /ˌæk.səˈden.t̬əl/

1.
acidental, casual
happening by chance or unexpectedly
:
•
Their meeting was purely accidental.
O encontro deles foi puramente acidental.
•
He made an accidental discovery.
Ele fez uma descoberta acidental.
1.
acidente
a musical note that is not part of the key signature but is introduced by a sharp, flat, or natural sign
:
•
The composer used an accidental to temporarily alter the pitch of the note.
O compositor usou um acidente para alterar temporariamente a altura da nota.
•
You need to play that F sharp, it's an accidental.
Você precisa tocar aquele Fá sustenido, é um acidente.