SLAa mark placed over, under, or through a letter in some languages, to show that the letter should be pronounced differently from the same letter without a mark 变音符,附加符号〔置于字母上下方或横贯字母的符号,表示该字母与无此符号的字母发音不同〕
—diacriticaladjectiveadj
diacritical marks
变音符号
Origindiacritic
(1600-1700)Greekdiakritikos, from krinein“to separate”