We found one dictionary that defines the word mutable signs:

Miscellaneous (1 matching dictionary)

1. Encyclopedia of Graphic Symbols (No longer online)

▸ Words similar to mutable signs ▸ Usage examples for mutable signs ▸ Idioms related to mutable signs ▸ Wikipedia articles (New!) ▸ Words that often appear near mutable signs ▸ Rhymes of mutable signs ▸ Invented words related to mutable signs