Real Dictionary

hacek in British English
a mark (ˇ) used over certain consonant letters in the orthography of some languages to indicate a specific sound, or used in certain systems of symbols for representing speech sounds
noun: a diacritic mark (ˇ) placed over certain letters in order to modify their sounds, esp used in Slavonic languages to indicate various forms of palatal articulation, as in the affricate č and the fricative trill ř used in Czech
noun: a diacritical mark (ˇ) placed over a letter in some languages, as Czech and Lithuanian, and in some systems of phonetic transcription, esp. to indicate that a sound is palatalized
noun: a symbol to indicate pronunciation that looks like a circumflex that is upside down and that is placed above a letter in Slavonic and Baltic languages