U+0345 was added to Unicode in version 1.1 (1993). It belongs to the block Combining Diacritical Marks in the Basic Multilingual Plane.

This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the script Greek. It is related to its uppercase variant Ι and its titlecase variant Ι. The character is also known as greek non-spacing iota below (1.0) and iota subscript.

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Nonspacing Mark and is not mirrored. The glyph can, under circumstances, be confused with 13 other glyphs. In text U+0345 behaves as Combining Mark regarding line breaks. It has type Extend for sentence and Extend for word breaks. The Grapheme Cluster Break is Extend.

The Wikipedia has the following information about this codepoint:

The iota subscript is a diacritic mark in the Greek alphabet shaped like a small vertical stroke or miniature iota ⟨ι⟩ placed below the letter. It can occur with the vowel letters eta ⟨η⟩, omega ⟨ω⟩, and alpha ⟨α⟩. It represents the former presence of an [i] offglide after the vowel, forming a so‐called “long diphthong”. Such diphthongs (i.e., ηι, ωι, ᾱι)  — phonologically distinct from the corresponding normal or “short” diphthongs (i.e., ει, οι, ᾰι ) — were a feature of ancient Greek in the classical era. The offglide was lost in pronunciation during the Hellenistic period with the result that from approximately the 1st century BC onwards the former diphthongs were no longer distinguished from the simple long vowels η, ω, ᾱ respectively. During the Roman and Byzantine eras, the iota, now mute, was sometimes still written as a normal letter but was often simply left out. The iota subscript was invented by Byzantine philologists in the 12th century AD as an editorial symbol marking the places where such spelling variation occurred.

The alternative practice, of writing the mute iota as a full-sized letter ⟨ι⟩, is known as iota adscript.


System Representation
UTF-8 CD 85
UTF-16 03 45
UTF-32 00 00 03 45
URL-Quoted %CD%85
HTML-Escape ͅ
Wrong windows-1252 Mojibake ͅ
alias greek non-spacing iota below (1.0)
alias iota subscript

Related Characters

  • ͺ
  • ᾀ
  • ᾁ
  • ᾂ
  • ᾃ
  • ᾄ
  • ᾅ
  • ᾆ
  • ᾇ
  • ᾈ
  • ᾉ
  • ᾊ
  • ᾋ
  • ᾌ
  • ᾍ
  • ᾎ
  • ᾏ
  • ᾐ
  • ᾑ
  • ᾒ
  • ᾓ
  • ᾔ
  • ᾕ
  • ᾖ
  • ᾗ
  • ᾘ
  • ᾙ
  • ᾚ
  • ᾛ
  • ᾜ
  • ᾝ
  • ᾞ
  • ᾟ
  • ᾠ
  • ᾡ
  • ᾢ
  • ᾣ
  • ᾤ
  • ᾥ
  • ᾦ
  • ᾧ
  • ᾨ
  • ᾩ
  • ᾪ
  • ᾫ
  • ᾬ
  • ᾭ
  • ᾮ
  • ᾯ
  • ᾲ
  • ᾳ
  • ᾴ
  • ᾷ
  • ᾼ
  • ῂ
  • ῃ
  • ῄ
  • ῇ
  • ῌ
  • ῲ
  • ῳ
  • ῴ
  • ῷ
  • ῼ


  • ̨
  • Ʈ
  • ɖ
  • ɭ
  • ɳ
  • ɽ
  • ʂ
  • ʐ
  • ̢
  • ͅ
  • Ҿ
  • ҿ
  • ᪷


Complete Record

Property Value
Age (age) 1.1
Block (blk) Diacriticals
General Category (gc) Nonspacing Mark
Script (sc) Inherited
Bidirectional Category (bc) Nonspacing Mark
Combining Class (ccc) Iota Subscript
Decomposition Type (dt) None
Decomposition Mapping (dm) ͅ
Lowercase (Lower)
Simple Lowercase Mapping (slc) ͅ
Lowercase Mapping (lc) ͅ
Uppercase (Upper)
Simple Uppercase Mapping (suc) Ι
Uppercase Mapping (uc) Ι
Simple Titlecase Mapping (stc) Ι
Titlecase Mapping (tc) Ι
Case Folding (cf) ι
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) ͅ
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) Ambiguous
Extender (Ext)
FC NFKC Closure (FC_NFKC) ͅ
Grapheme Cluster Break (GCB) Extend
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) Transparent
Line Break (lb) Combining Mark
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Maybe
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) ι
NFKC Quick Check (NFKC_QC) Maybe
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) Extend
Simple Case Folding (scf) ι
Script Extension (scx) Greek
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Extend
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)