A diacritical mark of the Greek script, called περισπωμένη(perispōménē, “twisted around”) in Ancient Greek, and found on ᾶ(â), ῆ(ê), ῖ(î), ῦ(û), and ῶ(ô). It is also known as circumflex and is printed either like an inverted breve or like a tilde. It was used to indicate the presence of a falling pitch accent on a long vowel or diphthong in the penultimate or final syllable of a word.