U+1018A GREEK ZERO SIGN

The Unicode character U+1018A, officially named GREEK ZERO SIGN, was introduced in Unicode version 4.1. It is part of the Ancient Greek Numbers block, which belongs to the Supplementary Multilingual plane.

Categorized technically as a Other Number, this character typically falls under the Greek 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 Other Neutral character. Its visual representation remains not mirrored regardless of the reading direction.