U+51F8 "凸" CJK Unified Ideograph-# Unicode Character

Unicode Version 18.0

凸
Source: Noto Sans CJK Source: Browser Default

U+51F8 "凸" CJK Unified Ideograph-# is a Chinese character that primarily means "convex" or "protruding," representing a shape that bulges outward, often contrasted with its counterpart "凹" (concave). It is used in various contexts, including geometry to describe a convex surface or shape, in typography for printing raised text, and in colloquial slang in Chinese internet culture as a visual emoticon resembling a face or a gesture. This character is part of the CJK (Chinese, Japanese, and Korean) unified ideographs block, with a rich history in East Asian languages where it appears in classical texts, modern signage, and digital communication.

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General Properties

Code Point
U+51F8
Version Added
1.1
Name
CJK Unified Ideograph-#
Block
CJK Unified Ideographs
General Category
Other Letter
Canonical Combining Class
Not Reordered
Bidirectional Class
Left To Right

Encodings

HTML Decimal Encoding
凸
HTML Hex Encoding
凸
UTF-8 Encoding
0xE5 0x87 0xB8
UTF-16 Encoding
0x51F8
UTF-32 Encoding
0x000051F8
C/C++/Java Escape
\u51f8

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
Ideographic
East Asian Width
Wide
Script
Han
Script Extensions
Han
Indic Syllabic Category
Other
ID Start
Yes
XID Start
Yes
ID Continue
Yes
XID Continue
Yes
Alphabetic
Yes
Vertical Orientation
Upright
Grapheme Base
Yes
Grapheme Cluster Break
Other
Word Break
Other
Sentence Break
OLetter
Ideographic
Yes
Unified Ideograph
Yes

Unihan Properties

kBigFive
A559
kCCCII
21334D
kCNS1986
1-4579
kCNS1992
1-4579
kCangjie
BSS
kCantonese
dat6
kCihaiT
171.503
kCowles
4106
kDaeJaweon
0301.050
kDefinition
protrude, bulge out, convex
kEACC
21334D
kFanqie
陀骨 徒結
kFenn
650G
kFennIndex
261.01 519.02
kFourCornerCode
7777.7
kGB0
4525
kGB1
4525
kGradeLevel
4
kHangul
철:0N
kHanYu
10307.060
kHanyuPinlu
tū(31)
kHanyuPinyin
10307.060:tū
kHKGlyph
0322
kIICore
AGTJHKMP
kIRGHanyuDaZidian
10307.060
kIRG_GSource
G0-4D39
kIRG_HSource
HB1-A559
kIRG_JSource
J0-464C
kIRG_KPSource
KP0-EDBA
kIRG_KSource
K0-7448
kIRG_TSource
T1-4579
kJapanese
トツ テツ でこ
kJoyoKanji
2010
kKoreanName
2015
kTGH
2013:229
kJapaneseKun
DERU
kJapaneseOn
TOTSU
kJis0
3844
kKangXi
0135.090
kKorean
CHEL TOL
kLau
499
kMainlandTelegraph
0424
kMandarin
tū
kMatthews
6305
kMeyerWempe
3023
kMojiJoho
MJ007440
kMorohashi
01809
kNelson
0090
kPhonetic
1318
kRSAdobe_Japan1_6
C+3236+17.2.3
kRSUnicode
17.3
kSBGY
481.05 493.14
kSMSZD2003Index
55.01
kSMSZD2003Readings
tū粵dat6
kTaiwanTelegraph
0424
kTGHZ2013
371.060:tū
kTotalStrokes
5
kUnihanCore2020
GHJKMPT
kXerox
256:156
kXHC1983
1160.030:tū