出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/08/26 21:55:47」(JST)
| ギリシア文字 | |||
|---|---|---|---|
| Αα | アルファ | Νν | ニュー |
| Ββ | ベータ | Ξξ | クシー |
| Γγ | ガンマ | Οο | オミクロン |
| Δδ | デルタ | Ππ | パイ |
| Εε | エプシロン | Ρρ | ロー |
| Ζζ | ゼータ | Σσς | シグマ |
| Ηη | エータ | Ττ | タウ |
| Θθ | テータ | Υυ | ユプシロン |
| Ιι | イオタ | Φφ | ファイ |
| Κκ | カッパ | Χχ | キー |
| Λλ | ラムダ | Ψψ | プシー |
| Μμ | ミュー | Ωω | オメガ |
| 使われなくなった文字 | |||
() |
ディガンマ | () |
コッパ |
| サン | () |
サンピ | |
| その他の文字 | |||
| スティグマ | ショー | ||
| ヘータ | |||
Β, β（ベータ、ベーター、ヴィタ、希: βητα、英: beta）は、ギリシア文字の一つ。伝統的な配列では2番目にくる。音価は、現代語では/v/。ラテンアルファベットのB（ビー）、キリル文字のВ（ヴェー）はこの文字を起源とし、キリル文字のБはこの文字の変形と考えられる。 音声記号（発音記号）として、小文字は「有声両唇摩擦音」をあらわす。
| 大文字 | Unicode | JIS X 0213 | 文字参照 | 小文字 | Unicode | JIS X 0213 | 文字参照 | 備考 |
|---|---|---|---|---|---|---|---|---|
| Β | U+0392 | 1-6-2 | Β Β |
β | U+03B2 | 1-6-34 | β β |
| Look up Β or β in Wiktionary, the free dictionary. |
| Greek alphabet | |||
|---|---|---|---|
| Αα | Alpha | Νν | Nu |
| Ββ | Beta | Ξξ | Xi |
| Γγ | Gamma | Οο | Omicron |
| Δδ | Delta | Ππ | Pi |
| Εε | Epsilon | Ρρ | Rho |
| Ζζ | Zeta | Σσς | Sigma |
| Ηη | Eta | Ττ | Tau |
| Θθ | Theta | Υυ | Upsilon |
| Ιι | Iota | Φφ | Phi |
| Κκ | Kappa | Χχ | Chi |
| Λλ | Lambda | Ψψ | Psi |
| Μμ | Mu | Ωω | Omega |
| History | |||
| Archaic local variants
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| In other languages | |||
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| Scientific symbols | |||
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Beta (UK /ˈbiːtə/ or US /ˈbeɪtə/; uppercase Β, lowercase β; Greek: Βήτα Bḗta) is the second letter of the Greek alphabet. In Ancient Greek, beta represented the voiced bilabial plosive /b/. In Modern Greek, it represents the voiced labiodental fricative /v/.
The letter Beta was derived from the Phoenician letter Beth . Letters that arose from Beta include the Roman letter ⟨B⟩ and the Cyrillic letters ⟨Б⟩ and ⟨В⟩.
In the system of Greek numerals Beta has a value of 2.
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Like the names of most other Greek letters, the name of beta was adopted from the acrophonic name of the corresponding letter in Phoenician, which was the common Semitic word *bayt ('house'). In Greek, the name was βῆτα bêta, pronounced [bɛ̂ːta] in Ancient Greek. It is spelled βήτα in the modern monotonic orthography, and pronounced [ˈvita]. In English, the name is pronounced /ˈbeɪtə/ (US)).
In computing the term "beta" is used as (usually) the last pre-release in the software release life cycle. It is sometimes referred to as 0.x in version numbers or x.x bx where x represents a number.
Beta is used in finance as a measure of investment portfolio risk.
In the International Phonetic Alphabet, Greek minuscule beta denotes a voiced bilabial fricative [β].
The name Beta was used as a name during the 2005 Atlantic hurricane season as Hurricane Beta.
Beta is often used to denote a variable in mathematics and physics, where it often has specific meanings for certain applications, such as representing beta radiation. In regression analysis, ⟨B⟩ symbolizes non-standardized partial slope coefficients, whereas ⟨β⟩ represents standardized (standard deviation-score form) coefficients; in both cases, the coefficients reflect the change in the criterion Y per one-unit change in the value of the associated predictor X.
The term "Beta" refers to advice on how to successfully complete a particular climbing route, boulder problem, or crux sequence.
In statistics, beta may represent type II error, or regression slope.
In some high-quality typesetting, especially in the French tradition, a typographic variant of the lowercase letter without a descender is used within a word: βίβλος is printed βίϐλος.[1]
In typesetting technical literature, it is a commonly made mistake to use the German letter ß (a double-s ligature) as a replacement for β. The two letters resemble each other in some fonts, but they are unrelated.
Beta was the name of a domestic videotape format developed by Japan's Sony Corporation in the 1970s and 1980s. It competed with the VHS (Video Home System) format developed by the Japanese Victor Company (JVC), to which it eventually succumbed. The Beta format was also marketed as Betamax (Sony) and Betacord (Sanyo).
| description | character | Unicode | HTML |
|---|---|---|---|
| GREEK CAPITAL LETTER BETA | Β | U+0392 | Β Β |
| GREEK SMALL LETTER BETA | β | U+03B2 | β β |
| GREEK BETA SYMBOL | ϐ | U+03D0 | ϐ |
| MODIFIER LETTER SMALL BETA | ◌ᵝ | U+1D5D | ᵝ |
| GREEK SUBSCRIPT SMALL LETTER BETA | ◌ᵦ | U+1D66 | ᵦ |
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| 拡張検索 | 「beta-lactam antibiotic」「プラスミド型AmpC beta-lactamase」「beta-alanine-pyruvate transaminase」「betaxolol」「beta-carboline」 |
| 関連記事 | 「be」 |