ᴔ

ᴔ U+1D14, ᴔ LATIN SMALL LETTER TURNED OE ← ᴓ [U+1D13] Phonetic Extensions ᴕ → [U+1D15]

French Wikipedia has an article on:

ᴔ

Wikipedia ^fr

Turned ⟨œ⟩, with turning used to indicate a reduced vowel.

ᴔ

1. (UPA, Teuthonista) A reduced œ vowel, such as the French schwa.
2. (superscript, UPA) an extremely short or fleeting ᴔ. [not supported by Unicode]

• (Latin script):  Aa  Bb  Cc  Dd  Ee  Ff  Gg  Hh  Ii  Jj  Kk  Ll  Mm  Nn  Oo  Pp  Qq  Rr  Sſs  Tt  Uu  Vv  Ww  Xx  Yy  Zz