U+03BF "ο" Greek Small Letter Omicron Unicode Character

U+03BF "ο" Greek Small Letter Omicron is the fifteenth letter of the Greek alphabet, representing the short vowel sound /o/ in Ancient Greek and the close-mid back rounded vowel /o̞/ in Modern Greek. It is distinct from the Latin letter "o" in both shape and typographic context, though it appears visually identical in many fonts. In mathematics and science, omicron is used less frequently than other Greek letters, but it has been adopted as the symbol for the fifteenth iteration or subtype in various naming conventions, such as in the classification of COVID-19 variants.

General Properties

Code Point	U+03BF
Version Added	1.1
Name	Greek Small Letter Omicron
Block	Greek and Coptic
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right

Encodings

HTML Decimal Encoding	ο
HTML Hex Encoding	ο
UTF-8 Encoding	0xCE 0xBF
UTF-16 Encoding	0x03BF
UTF-32 Encoding	0x000003BF
C/C++/Java Escape	\u03bf

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
NFKD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
East Asian Width	Ambiguous
Lowercase	Yes
Simple Uppercase Code Point	"Ο" U+039F Greek Capital Letter Omicron
Simple Titlecase Code Point	"Ο" U+039F Greek Capital Letter Omicron
Uppercase Code Point	"Ο" U+039F Greek Capital Letter Omicron
Titlecase Code Point	"Ο" U+039F Greek Capital Letter Omicron
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