U+8166 was added to Unicode in version 1.1 (1993). It belongs to the block CJK Unified Ideographs in the Basic Multilingual Plane.

This character is a Other Letter and is mainly used in the Han script. The Unihan Database defines it as brain. Its Pīnyīn pronunciation is n.

The glyph is not a composition. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+8166 behaves as Ideographic regarding line breaks. It has type OLetter for sentence and Other for word breaks. The Grapheme Cluster Break is Any.


System Representation
UTF-8 E8 85 A6
UTF-16 81 66
UTF-32 00 00 81 66
URL-Quoted %E8%85%A6
HTML-Escape 腦
Wrong windows-1252 Mojibake 腦
Encoding: EUC-KR (hex bytes) D2 E0
Encoding: JIS0208 (hex bytes) E7 AA
Pīnyīn n
IRG_GSource G1-4454
IRG_HSource HB1-
IRG_JSource J0-672A
IRG_KPSource KP0-D5A
IRG_KSource K0-5260
IRG_TSource T1-662A
IRG_VSource V1-642
BigFive B8A3
CCCII 215365
CNS1986 1-662A
CNS1992 1-662A
EACC 215365
GB1 3652
Jis0 7110
KSC0 5064
TaiwanTelegraph 5207
Xerox 245:345


Complete Record

Property Value
Age (age) 1.1
Unicode Name (na) CJK UNIFIED IDEOGRAPH-8166
Unicode 1 Name (na1)
Block (blk) CJK
General Category (gc) Other Letter
Script (sc) Han
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) None
Decomposition Mapping (dm) 腦
Lowercase (Lower)
Simple Lowercase Mapping (slc) 腦
Lowercase Mapping (lc) 腦
Uppercase (Upper)
Simple Uppercase Mapping (suc) 腦
Uppercase Mapping (uc) 腦
Simple Titlecase Mapping (stc) 腦
Titlecase Mapping (tc) 腦
Case Folding (cf) 腦
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) 腦
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Wide
Extender (Ext)
FC NFKC Closure (FC_NFKC) 腦
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
kIICore (kIICore) ATH
kIRG_GSource (kIRG_GSource) G1-4454
kIRG_HSource (kIRG_HSource) HB1-
kIRG_JSource (kIRG_JSource) J0-672A
kIRG_KPSource (kIRG_KPSource) KP0-D5A
kIRG_KSource (kIRG_KSource) K0-5260
kIRG_TSource (kIRG_TSource) T1-662A
kIRG_VSource (kIRG_VSource) V1-642
kIRGDaeJaweon (kIRGDaeJaweon) 1440.320
kIRGDaiKanwaZiten (kIRGDaiKanwaZiten) 29681
kIRGHanyuDaZidian (kIRGHanyuDaZidian) 32100.070
kIRGKangXi (kIRGKangXi) 0988.200
kBigFive (kBigFive) B8A3
kCangjie (kCangjie) BVVW
kCantonese (kCantonese) nou5
kCCCII (kCCCII) 215365
kCihaiT (kCihaiT) 1100.205
kCNS1986 (kCNS1986) 1-662A
kCNS1992 (kCNS1992) 1-662A
kCowles (kCowles) 2926
kDaeJaweon (kDaeJaweon) 1440.320
Unihan Definition (kDefinition) brain
kEACC (kEACC) 215365
kFenn (kFenn) 428A
kFennIndex (kFennIndex) 357.06
kFourCornerCode (kFourCornerCode) 7226.3
kFrequency (kFrequency) 2
kGB1 (kGB1) 3652
kGradeLevel (kGradeLevel) 2
kGSR (kGSR) 1244f
kHangul (kHangul)
kHanYu (kHanYu) 32100.070
kHanyuPinlu (kHanyuPinlu) nǎo(437)
kHanyuPinyin (kHanyuPinyin) 32100.070:nǎo,nào
kHKGlyph (kHKGlyph) 3330
kJapaneseKun (kJapaneseKun) NOU NOUMISO ATAMA
kJapaneseOn (kJapaneseOn) NOU DOU
kJis0 (kJis0) 7110
kKangXi (kKangXi) 0988.200
kKorean (kKorean) NOY
kKPS0 (kKPS0) D5AA
kKSC0 (kKSC0) 5064
kLau (kLau) 2395
kMandarin (kMandarin) nǎo
kMatthews (kMatthews) 4638
kMeyerWempe (kMeyerWempe) 2104
kMorohashi (kMorohashi) 29681
kNelson (kNelson) 3789
kPhonetic (kPhonetic) 985
Radical Stroke Count (Adobe Japan 1-6) (kRSAdobe_Japan1_6) C+6261+130.4.9
Radical Stroke Count (KangXi) (kRSKangXi) 130.9
Radical Stroke Count (Unicode) (kRSUnicode) 130.9
kSBGY (kSBGY) 302.05 419.06
Semantic Variant (kSemanticVariant) 匘
Simplified Variant (kSimplifiedVariant) 脑
kTaiwanTelegraph (kTaiwanTelegraph) 5207
kTang (kTang) nɑ̌u
Stroke Number (kTotalStrokes) 13
kVietnamese (kVietnamese) não
kXerox (kXerox) 245:345
kXHC1983 (kXHC1983) 0819.171:nǎo
Line Break (lb) Ideographic
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) 腦
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) Yes
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) OLetter
Simple Case Folding (scf) 腦
Script Extension (scx) Han
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Other
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)