double whole note

US /ˌdʌb.əl ˈhoʊl ˌnoʊt/
UK /ˌdʌb.əl ˈhoʊl ˌnoʊt/
"double whole note" picture
1.

二全音符, 倍全音符

a musical note having the longest time value in common use, equal to two whole notes or eight quarter notes

:
The composer used a double whole note to indicate a sustained sound.
作曲家使用了一個二全音符來表示持續的聲音。
A double whole note is rarely seen in modern music notation.
二全音符在現代音樂記譜中很少見。