U+1F40 "ὀ" Greek Small Letter Omicron with Psili Unicode Character
Unicode Version 17.0
ὀ
U+1F40 "ὀ" Greek Small Letter Omicron with Psili is a precomposed character used in the polytonic orthography of the Greek language, where it represents the letter omicron marked with a psili, or smooth breathing mark, indicating that the vowel is pronounced without a preceding aspirated "h" sound. This character is part of the Greek Extended block of Unicode and is historically employed in ancient and liturgical Greek texts to denote the initial vowel in words where no rough breathing is present. It differs from the standard lowercase omicron by its specific diacritical placement, which helps convey accurate pronunciation and grammatical meaning in scholarly editions.
General Properties
| Code Point | U+1F40 |
| Version Added | 1.1 |
| Name | Greek Small Letter Omicron with Psili |
| Block | Greek Extended |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "ο" U+03BF Greek Small Letter Omicron "̓" U+0313 Combining Comma Above |
Encodings
| HTML Decimal Encoding | ὀ |
| HTML Hex Encoding | ὀ |
| UTF-8 Encoding | 0xE1 0xBD 0x80 |
| UTF-16 Encoding | 0x1F40 |
| UTF-32 Encoding | 0x00001F40 |
| C/C++/Java Escape | \u1f40 |
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 | "Ὀ" U+1F48 Greek Capital Letter Omicron with Psili |
| Simple Titlecase Code Point | "Ὀ" U+1F48 Greek Capital Letter Omicron with Psili |
| Uppercase Code Point | "Ὀ" U+1F48 Greek Capital Letter Omicron with Psili |
| Titlecase Code Point | "Ὀ" U+1F48 Greek Capital Letter Omicron with Psili |
| 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 |