U+03D4 GREEK UPSILON WITH DIAERESIS AND HOOK SYMBOL

The Unicode character U+03D4, officially named GREEK UPSILON WITH DIAERESIS AND HOOK SYMBOL, was introduced in Unicode version 1.1. It is part of the Greek block, which belongs to the Basic Multilingual plane. Previously, it was also referred to as GREEK CAPITAL LETTER UPSILON HOOK DIAERESIS.

Categorized technically as a Uppercase Letter, this character typically falls under the Greek script. In terms of text layout and rendering, the glyph is a canonical 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.