signo diacrítico

(n.) = diacritical, diacritical mark, diacritic mark
Ex: If the name contains diacriticals, the symbols under certain characters of the entry indicate which diacriticals apply to those characters. Ex: Diacritical marks such as umlauts, accents, diereses may either be ignored, or be assigned a filing value. Ex: The author proposes a method very similar to those in current use but without diacritic marks or special letters.