U+03AA "Ϊ" Greek Capital Letter Iota with Dialytika Unicode Character
Unicode Version 17.0
Ϊ
U+03AA "Ϊ" Greek Capital Letter Iota with Dialytika is a glyph used in the Greek script to indicate that the letter iota should be pronounced separately from a preceding vowel rather than forming a diphthong, a diacritical function known as the diaeresis or dialytika. This uppercase character corresponds to the lowercase iota with dialytika (ϊ) and appears in words where the iota must be distinctly articulated, such as in certain loanwords or contexts requiring clarity in pronunciation. It is encoded in the Unicode standard as part of the Greek and Coptic block, ensuring its proper representation in digital text systems that support multilingual typography.
General Properties
| Code Point | U+03AA |
| Version Added | 1.1 |
| Name | Greek Capital Letter Iota with Dialytika |
| Unicode 1.0 Name | Greek Capital Letter Iota Diaeresis |
| Block | Greek and Coptic |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "Ι" U+0399 Greek Capital Letter Iota "̈" U+0308 Combining Diaeresis |
Encodings
| HTML Decimal Encoding | Ϊ |
| HTML Hex Encoding | Ϊ |
| UTF-8 Encoding | 0xCE 0xAA |
| UTF-16 Encoding | 0x03AA |
| UTF-32 Encoding | 0x000003AA |
| C/C++/Java Escape | \u03aa |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| Lowercase Code Point | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| Simple Case Folding | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| Case Folding | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| NFKC Simple Casefold | "ϊ" U+03CA Greek Small Letter Iota with Dialytika |
| Script | Greek |
| Script Extensions | Greek |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |