EDIT schwa This symbol, a rotated lowercase letter "e", is used in the International Phonetic Alphabet to represent the "mid central unrounded vowel", which, for example, is used in the second syllable of the English word "harmony".

 Denelson83 

EDIT Same glyph as ǝ U+01DD LATIN SMALL LETTER TURNED E.

 80.135.83.111  80.135.83.111