<p><strong>Noun</strong></p><ul><li>Also called diacritical mark.</li><li>A mark, point, or sign added or attached to a letter or character to distinguish it from another of similar form, to give it a particular phonetic value, to indicate stress, etc., as a cedilla, tilde, circumflex, or macron.</li></ul><p><strong>Adjective</strong></p><ul><li>Diacritical.</li><li>Diagnostic.</li></ul>