ˤ

Symbol

 * 1)  pharyngealization (that is, -coloring, of a pharyngealized consonant or vowel).
 * 2)  -fricated release of a plosive (e.g., sometimes implying an affricate ); or a weak, fleeting or epenthetic.
 * 3)   (ayin).
 * 4)  marks an implosive consonant.

Usage notes
The difference between the Unicode characters U+02C1 $⟨ˁ⟩$ and U+02E4 $⟨ˤ⟩$ is not well defined. U+02C1 may be set as a dotless reversed question mark ⸮, with only 02E4 set as a superscript. However, depending on the typeface, there may be no graphic difference between 02C1 and 02E4.
 * U+02C1 (modifier reversed glottal stop) is given as a typographic alternate of the Egyptological ayin, U+02BF $⟨ꜥ⟩$, which would be transcribed in IPA with the letter U+0295 $⟨ʕ⟩$.
 * U+02E4 (modifier small reversed glottal stop) is defined as a superscript IPA letter U+0295 $⟨ʕ⟩$, and the IPA identifies it as the character for pharyngealization. (The 'small' in the name [normally meaning 'lower-case' in Unicode] is misleading, as the letter $⟨ʕ⟩$ is unicase.)