𝄬 U+1D12C, 𝄬
MUSICAL SYMBOL FLAT UP
𝄫
[U+1D12B]
Musical Symbols 𝄭
[U+1D12D]

Translingual edit

 
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𝄬

  1. (music, dated) A quarter tone flat note.
    Synonym: 𝇭
  2. (music) An undefined microtone note between a quarter tone flat and a full flat; the exact value needs to be defined for each work.