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HTML 符号实体参考手册

HTML 符号实体

如果我们希望浏览器正确地显示在 HTML 中预留的字符，我们必须在 HTML 源码中插入字符实体。

字符实体有三部分：一个和号 ‘&’ 和一个实体名称（或者一个 ‘#’ 和一个实体编号），以及一个分号‘;’。

本字符实体参考手册包括了数学符号、希腊字符、各种箭头记号、科技符号以及形状。

注释： 实体名称对大小写敏感。

HTML 支持的数学符号

字符 实体编号 实体名称 描述
∀ ∀ for all
∂ ∂ part
∃ ∃ exists
∅ ∅ empty
∇ ∇ nabla
∈ ∈ ∈ isin
∉ ∉ notin
∋ ∋ ni
∏ ∏ ∏ prod
∑ ∑ ∑ sum
- − − minus
* ∗ ∗ lowast
√ √ √ square root
∝ ∝ ∝ proportional to
∞ ∞ ∞ infinity
∠ ∠ ∠ angle
∧ ∧ ∧ and
∨ ∨ ∨ or
∩ ∩ ∩ cap
∪ ∪ ∪ cup
∫ ∫ ∫ integral
∴ ∴ ∴ therefore
~ ∼ ∼ similar to
≅ ≅ congruent to
≈ ≈ ≈ almost equal
≠ ≠ ≠ not equal
≡ ≡ ≡ equivalent
≤ ≤ ≤ less or equal
≥ ≥ ≥ greater or equal
⊂ ⊂ subset of
⊃ ⊃ superset of
⊄ ⊄ not subset of
⊆ ⊆ subset or equal
⊇ ⊇ superset or equal
⊕ ⊕ ⊕ circled plus
⊗ ⊗ circled times
⊥ ⊥ ⊥ perpendicular
· ⋅ ⋅ dot operator

HTML 支持的希腊字母

字符 实体编号 实体名称 描述
Α Α Α Alpha
Β Β Β Beta
Γ Γ Γ Gamma
Δ Δ Δ Delta
Ε Ε Ε Epsilon
Ζ Ζ Ζ Zeta
Η Η Η Eta
Θ Θ Θ Theta
Ι Ι Ι Iota
Κ Κ Κ Kappa
Λ Λ Λ Lambda
Μ Μ Μ Mu
Ν Ν Ν Nu
Ξ Ξ Ξ Xi
Ο Ο Ο Omicron
Π Π Π Pi
Ρ Ρ Ρ Rho
  undefined   Sigmaf
Σ Σ Σ Sigma
Τ Τ Τ Tau
Υ Υ Υ Upsilon
Φ Φ Φ Phi
Χ Χ Χ Chi
Ψ Ψ Ψ Psi
Ω Ω Ω Omega
       
α α α alpha
β β β beta
γ γ γ gamma
δ δ δ delta
ε ε ε epsilon
ζ ζ ζ zeta
η η η eta
θ θ θ theta
ι ι ι iota
κ κ κ kappa
λ λ λ lambda
μ μ μ mu
ν ν ν nu
ξ ξ ξ xi
ο ο ο omicron
π π π pi
ρ ρ ρ rho
ς ς sigmaf
σ σ σ sigma
τ τ τ tau
υ υ υ upsilon
φ φ φ phi
χ χ χ chi
ψ ψ ψ psi
ω ω ω omega
       
θ ϑ ϑ theta symbol
Υ ϒ ϒ upsilon symbol
π ϖ ϖ pi symbol

HTML 支持的其他实体

字符 实体编号 实体名称 描述
OE ΠΠcapital ligature OE
oe œ œ small ligature oe
S Š Š capital S with caron
s š š small S with caron
"Y Ÿ Ÿ capital Y with diaeres
f ƒ ƒ f with hook
^ ˆ ˆ modifier letter circumflex accent
~ ˜ ˜ small tilde
    en space
    em space
    thin space
‌ ‌ zero width non-joiner
‍ ‍ zero width joiner
‎ ‎ left-to-right mark
‏ ‏ right-to-left mark
– – – en dash
— — — em dash
' ‘ ‘ left single quotation mark
' ’ ’ right single quotation mark
' ‚ ‚ single low-9 quotation mark
" “ “ left double quotation mark
" ” ” right double quotation mark
" „ „ double low-9 quotation mark
+ † † dagger
‡ ‡ double dagger
o • • bullet
… … … horizontal ellipsis
‰ ‰ ‰ per mille 
′ ′ ′ minutes
″ ″ ″ seconds
< &#8249; &lsaquo; single left angle quotation
> &#8250; &rsaquo; single right angle quotation
&#8254; &oline; overline
EUR &#8364; &euro; euro
TM &#8482; or &#153; &trade; trademark
← &#8592; &larr; left arrow
↑ &#8593; &uarr; up arrow
→ &#8594; &rarr; right arrow
↓ &#8595; &darr; down arrow
<-> &#8596; &harr; left right arrow
&#8629; &crarr; carriage return arrow
&#8968; &lceil; left ceiling
&#8969; &rceil; right ceiling
&#8970; &lfloor; left floor
&#8971; &rfloor; right floor
&#9674; &loz; lozenge
&#9824; &spades; spade
&#9827; &clubs; club
&#9829; &hearts; heart
&#9830; &diams; diamond

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