F' (F + apostrophe) may stand in for: Fʼ (F + modifier apostrophe), which represents: the labiodental ejective fricative, in the International Phonetic Alphabet palatalised f, in Slavic notation F′ (F + prime), often used in mathematical notation for the first derivative of a function F̀ (F + grave accent), used for transliterating the Cyrillic letter Fita Fʻ (F + ʻokina) Fʾ (F + right half ring) Fʿ (F + left half ring)