U+222E Contour Integral
U+222E was added in Unicode version 1.1 in 1993. It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is mirrored. If its East Asian Width is “narrow”, U+222E forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts. The glyph can be confused with 2 other glyphs.
The CLDR project calls this character “contour integral” for use in screen reading software.
The Wikipedia has the following information about this codepoint:
In mathematics, a line integral is an integral where the function to be integrated is evaluated along a curve. The terms path integral, curve integral, and curvilinear integral are also used; contour integral is used as well, although that is typically reserved for line integrals in the complex plane.
The function to be integrated may be a scalar field or a vector field. The value of the line integral is the sum of values of the field at all points on the curve, weighted by some scalar function on the curve (commonly arc length or, for a vector field, the scalar product of the vector field with a differential vector in the curve). This weighting distinguishes the line integral from simpler integrals defined on intervals. Many simple formulae in physics, such as the definition of work as $W=F\cdot s$, have natural continuous analogues in terms of line integrals, in this case $W={\int}_{L}F\left(s\right)\cdot ds$, which computes the work done on an object moving through an electric or gravitational field F along a path $L$.
Representations
System  Representation 

Nº  8750 
UTF8  E2 88 AE 
UTF16  22 2E 
UTF32  00 00 22 2E 
URLQuoted  %E2%88%AE 
HTML hex reference  ∮ 
Wrong windows1252 Mojibake  âˆ® 
HTML named entity  ∮ 
HTML named entity  ∮ 
HTML named entity  ∮ 
Encoding: EUCKR (hex bytes)  A2 B1 
Encoding: JIS0208 (hex bytes)  AD F3 
L^{A}T_{E}X  \oint 
Adobe Glyph List  contourintegral 
digraph  Io 
Related Characters
Confusables
Elsewhere
Complete Record
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1.1 (1993)  
CONTOUR INTEGRAL  
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R 