U+03CB "ϋ" Greek Small Letter Upsilon with Dialytika Unicode Character
U+03CB "ϋ" Greek Small Letter Upsilon with Dialytika is a distinct character in the Greek script that represents the letter upsilon with a diaeresis, also known as dialytika, which indicates that the vowel should be pronounced separately from a preceding vowel rather than forming a diphthong. This character is used primarily in modern Greek orthography, where it appears in words such as "αϋπνία" (insomnia) to clarify syllable division and pronunciation. It belongs to the Greek and Coptic block of Unicode, with a decimal value of 971, and is encoded as a precomposed form for compatibility and ease of use in digital text, instead of relying on a combining diacritic mark. The dialytika is visually identical to the umlaut in Latin scripts but serves a different grammatical function in Greek, ensuring precise phonetic representation in written language.
General Properties
| Code Point | U+03CB |
| Version Added | 1.1 |
| Name | Greek Small Letter Upsilon with Dialytika |
| Unicode 1.0 Name | Greek Small Letter Upsilon Diaeresis |
| Block | Greek and Coptic |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "υ" U+03C5 Greek Small Letter Upsilon "̈" U+0308 Combining Diaeresis |
Encodings
| HTML Decimal Encoding | ϋ |
| HTML Hex Encoding | ϋ |
| UTF-8 Encoding | 0xCF 0x8B |
| UTF-16 Encoding | 0x03CB |
| UTF-32 Encoding | 0x000003CB |
| C/C++/Java Escape | \u03cb |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ϋ" U+03AB Greek Capital Letter Upsilon with Dialytika |
| Simple Titlecase Code Point | "Ϋ" U+03AB Greek Capital Letter Upsilon with Dialytika |
| Uppercase Code Point | "Ϋ" U+03AB Greek Capital Letter Upsilon with Dialytika |
| Titlecase Code Point | "Ϋ" U+03AB Greek Capital Letter Upsilon with Dialytika |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| 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 | Lower |