The term PRONUNCIATION MARK refers to two symbols used in linguistics and phonetics. The first is a BREVE, which is a diacritic mark that looks like a small circle and is placed over a vowel to indicate a short sound. The second is a tilde, which is a diacritic mark that looks like a small wave and is placed over a vowel to indicate a nasal sound. Both of these symbols are used to indicate the correct pronunciation of words.