What is "ogonek"

n. (context orthography English) A hook-shaped diacritical mark attached underneath a vowel, typically to indicate nasalization, as in '''ą''', '''ę''', '''į''', '''ǫ''' or '''ų'''.

The ogonek ( Polish: , "little tail", the diminutive of ogon; , "nasal") is a diacritic hook placed under the lower right corner of a vowel in the Latin alphabet used in several European languages, and directly under a vowel in several Native American languages.