U+03BE "ξ" Greek Small Letter Xi Unicode Character

U+03BE "ξ" Greek Small Letter Xi is the fourteenth letter of the Greek alphabet and represents the voiceless velar fricative sound, similar to the "x" in "box" in English, though in modern Greek it is pronounced as "ks." In ancient Greek, it held a numeric value of 60 in the Greek numeral system. This character is widely used in mathematics, science, and engineering to denote variables such as a random variable in probability, the damping ratio in control theory, or the Riemann Xi function in number theory. Its visual form resembles a stylized trident or three horizontal strokes, making it distinct from other Greek letters.

General Properties

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

Encodings

HTML Decimal Encoding	ξ
HTML Hex Encoding	ξ
UTF-8 Encoding	0xCE 0xBE
UTF-16 Encoding	0x03BE
UTF-32 Encoding	0x000003BE
C/C++/Java Escape	\u03be

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	"Ξ" U+039E Greek Capital Letter Xi
Simple Titlecase Code Point	"Ξ" U+039E Greek Capital Letter Xi
Uppercase Code Point	"Ξ" U+039E Greek Capital Letter Xi
Titlecase Code Point	"Ξ" U+039E Greek Capital Letter Xi
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