accidental

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