8 ms·

It's used for the Uralic Phonetic Alphabet. https://www.unicode.org/L2/L2009/09028-n3571-upa-additions.pdf https://www.unicode.org/L2/L2009/09028-n3571-upa-add

• neolog 6y ago
  Interesting, how did you figure that out?
  • saagarjha 6y ago
    You can look up the characters in the database, they fall under "Subscripts for UPA".