HTML 符号实体
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
|
theta symbol
|
?
|
ϒ
|
ϒ
|
upsilon symbol
|
?
|
ϖ
|
ϖ
|
pi symbol
|
HTML 支持的其他实体
字符
|
实体编号
|
实体名称
|
描述
|
?
|
Œ
|
Œ
|
capital ligature OE
|
?
|
œ
|
œ
|
small ligature oe
|
?
|
Š
|
Š
|
capital S with caron
|
?
|
š
|
š
|
small S with caron
|
?
|
Ÿ
|
Ÿ
|
capital Y with diaeres
|
?
|
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
|
?
|
•
|
•
|
bullet
|
…
|
…
|
…
|
horizontal ellipsis
|
‰
|
‰
|
‰
|
per mille
|
′
|
′
|
′
|
minutes
|
″
|
″
|
″
|
seconds
|
?
|
‹
|
‹
|
single left angle quotation
|
?
|
›
|
›
|
single right angle quotation
|
 ̄
|
‾
|
‾
|
overline
|
€
|
€
|
€
|
euro
|
?
|
™ or ™
|
™
|
trademark
|
←
|
←
|
←
|
left arrow
|
↑
|
↑
|
↑
|
up arrow
|
→
|
→
|
→
|
right arrow
|
↓
|
↓
|
↓
|
down arrow
|
?
|
↔
|
↔
|
left right arrow
|
?
|
↵
|
↵
|
carriage return arrow
|
?
|
⌈
|
⌈
|
left ceiling
|
?
|
⌉
|
⌉
|
right ceiling
|
?
|
⌊
|
⌊
|
left floor
|
?
|
⌋
|
⌋
|
right floor
|
?
|
◊
|
◊
|
lozenge
|
?
|
♠
|
♠
|
spade
|
?
|
♣
|
♣
|
club
|
?
|
♥
|
♥
|
heart
|
?
|
♦
|
♦
|
diamond
|