Omega

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For other uses, see Omega (disambiguation).

Omega (capital: Ω, lowercase: ω; Greek Ωμέγα) is the 24th and last letter of the Greek alphabet. In the Greek numeric system, it has a value of 800. The word literally means "great O" (ō mega, mega meaning 'great'), as opposed to omicron, which means "little O" (o mikron, micron meaning "little").[1] This name is Byzantine; in Classical Greek, the letter was called ō (), whereas the omicron was called ou (οὖ).[2] The form of the uppercase letter derives from that of an omicron (Ο) broken up at the side (Greek Omega 09.svg), with the edges subsequently turned outward (Greek Omega 05.svg, Greek Omega 03.svg, Greek Omega 07.svg).[3] The modern lowercase shape goes back to the uncial form Greek uncial Omega.svg, a form that developed during the 3rd century BC in ancient handwriting on papyrus, from a flattened-out form of the letter (Greek Omega 08.svg) that had its edges curved even further upward.[4]

In phonetic terms, the Ancient Greek Ω is a long open-mid o [ɔː], comparable to the vowel of British English raw. In Modern Greek, Ω represents the same sound as omicron. The letter omega is transcribed ō or simply o.

Omega (the last letter of the Greek alphabet) is often used to denote the last, the end, or the ultimate limit of a set, in contrast to alpha, the first letter of the Greek alphabet.

Omega was also adopted into the early Cyrillic alphabet. See Cyrillic omega (Ѡ, ѡ). A Raetic variant is conjectured to be at the origin or parallel evolution of the Elder Futhark .

Omega was also adopted into the Latin alphabet, as a letter of the 1982 revision to the African reference alphabet. It has had little use. See Latin omega.

Omega is also used in Christianity, as a part of the Alpha and Omega metaphor.

The symbol Ω (uppercase letter)[edit]

The uppercase letter Ω is used as a symbol:

The symbol ω (lower case letter)[edit]

The minuscule letter ω is used as a symbol:

Character Encodings[edit]

  • Greek Omega / Coptic Oou
Character Ω ω
Unicode name GREEK CAPITAL LETTER OMEGA GREEK SMALL LETTER OMEGA COPTIC CAPITAL LETTER OOU COPTIC SMALL LETTER OOU
Encodings decimal hex decimal hex decimal hex decimal hex
Unicode 937 U+03A9 969 U+03C9 11440 U+2CB0 11441 U+2CB1
UTF-8 206 169 CE A9 207 137 CF 89 226 178 176 E2 B2 B0 226 178 177 E2 B2 B1
Numeric character reference Ω Ω ω ω Ⲱ Ⲱ ⲱ ⲱ
Named character reference Ω ω
DOS Greek 151 97 224 E0
DOS Greek-2 213 D5 250 FA
Windows 1253 217 D9 249 F9
TeX \Omega \omega

[6]

  • Cyrillic Omega
Character Ѡ ѡ
Unicode name CYRILLIC CAPITAL LETTER OMEGA CYRILLIC SMALL LETTER OMEGA COMBINING CYRILLIC LETTER OMEGA
Encodings decimal hex decimal hex decimal hex
Unicode 1120 U+0460 1121 U+0461 42619 U+A67B
UTF-8 209 160 D1 A0 209 161 D1 A1 234 153 187 EA 99 BB
Numeric character reference Ѡ Ѡ ѡ ѡ ꙻ ꙻ
Character Ѻ ѻ
Unicode name CYRILLIC CAPITAL LETTER ROUND OMEGA CYRILLIC SMALL LETTER ROUND OMEGA CYRILLIC CAPITAL LETTER BROAD OMEGA CYRILLIC SMALL LETTER BROAD OMEGA
Encodings decimal hex decimal hex decimal hex decimal hex
Unicode 1146 U+047A 1147 U+047B 42572 U+A64C 42573 U+A64D
UTF-8 209 186 D1 BA 209 187 D1 BB 234 153 140 EA 99 8C 234 153 141 EA 99 8D
Numeric character reference Ѻ Ѻ ѻ ѻ Ꙍ Ꙍ ꙍ ꙍ
  • Latin / IPA Omega
Character ɷ
Unicode name LATIN SMALL LETTER CLOSED OMEGA
Encodings decimal hex
Unicode 631 U+0277
UTF-8 201 183 C9 B7
Numeric character reference ɷ ɷ
  • Technical Omega symbols
Character
Unicode name APL FUNCTIONAL SYMBOL OMEGA APL FUNCTIONAL SYMBOL OMEGA UNDERBAR OHM SIGN INVERTED OHM SIGN
Encodings decimal hex decimal hex decimal hex decimal hex
Unicode 9077 U+2375 9081 U+2379 8486 U+2126 8487 U+2127
UTF-8 226 141 181 E2 8D B5 226 141 185 E2 8D B9 226 132 166 E2 84 A6 226 132 167 E2 84 A7
Numeric character reference ⍵ ⍵ ⍹ ⍹ Ω Ω ℧ ℧
  • Mathematical Omega
Character 𝛀 𝛚 𝛺 𝜔 𝜴 𝝎
Unicode name MATHEMATICAL BOLD
CAPITAL OMEGA
MATHEMATICAL BOLD
SMALL OMEGA
MATHEMATICAL ITALIC
CAPITAL OMEGA
MATHEMATICAL ITALIC
SMALL OMEGA
MATHEMATICAL BOLD ITALIC
CAPITAL OMEGA
MATHEMATICAL BOLD ITALIC
SMALL OMEGA
Encodings decimal hex decimal hex decimal hex decimal hex decimal hex decimal hex
Unicode 120512 U+1D6C0 120538 U+1D6DA 120570 U+1D6FA 120596 U+1D714 120628 U+1D734 120654 U+1D74E
UTF-8 240 157 155 128 F0 9D 9B 80 240 157 155 154 F0 9D 9B 9A 240 157 155 186 F0 9D 9B BA 240 157 156 148 F0 9D 9C 94 240 157 156 180 F0 9D 9C B4 240 157 157 142 F0 9D 9D 8E
UTF-16 55349 57024 D835 DEC0 55349 57050 D835 DEDA 55349 57082 D835 DEFA 55349 57108 D835 DF14 55349 57140 D835 DF34 55349 57166 D835 DF4E
Numeric character reference 𝛀 𝛀 𝛚 𝛚 𝛺 𝛺 𝜔 𝜔 𝜴 𝜴 𝝎 𝝎
Character 𝝮 𝞈 𝞨 𝟂 𝟔
Unicode name MATHEMATICAL SANS-SERIF
BOLD CAPITAL OMEGA
MATHEMATICAL SANS-SERIF
BOLD SMALL OMEGA
MATHEMATICAL SANS-SERIF
BOLD ITALIC CAPITAL OMEGA
MATHEMATICAL SANS-SERIF
BOLD ITALIC SMALL OMEGA
MATHEMATICAL SANS-SERIF
BOLD ITALIC P.OOO OMEGA
Encodings decimal hex decimal hex decimal hex decimal hex decimal hex
Unicode 120686 U+1D76E 120712 U+1D788 120744 U+1D7A8 120770 U+1D7C2 120788 U+1D7D4
UTF-8 240 157 157 174 F0 9D 9D AE 240 157 158 136 F0 9D 9E 88 240 157 158 168 F0 9D 9E A8 240 157 159 130 F0 9D 9F 82 240 157 159 148 F0 9D 9F 94
UTF-16 55349 57198 D835 DF6E 55349 57224 D835 DF88 55349 57256 D835 DFA8 55349 57282 D835 DFC2 55349 57300 D835 DFD4
Numeric character reference 𝝮 𝝮 𝞈 𝞈 𝞨 𝞨 𝟂 𝟂 𝟔 𝟔

These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style.

Notes[edit]

  1. ^ The Greek Alphabet
  2. ^ Herbert Weir Smyth. A Greek Grammar for Colleges. §1
  3. ^ Anne Jeffery (1961), The local scripts of archaic Greece, p.37–38.
  4. ^ Edward M. Thompson (1912), Introduction to Greek and Latin paleography, Oxford: Clarendon. p.144
  5. ^ Excerpts from The Unicode Standard, Version 4.0. Retrieved 11 October 2006.
  6. ^ Unicode Code Charts: Greek and Coptic (Range: 0370-03FF)