U+1A64 TAI THAM VOWEL SIGN TALL AA

The Unicode character U+1A64, officially named TAI THAM VOWEL SIGN TALL AA, was introduced in Unicode version 5.2. It is part of the Tai Tham block, which belongs to the Basic Multilingual plane.

Categorized technically as a Spacing Mark, this character typically falls under the Lana script. In terms of text layout and rendering, the glyph is not a composition and has no designated width in East Asian typography. When placed in bidirectional text, it behaves as an Left-To-Right character. Its visual representation remains not mirrored regardless of the reading direction.