HTML 实体 ( 字母 - U )
下表中的有些实体不被所有浏览器支持，使用过程中需要自己去调试每个浏览器
IE 11+ 是唯一一个能正确显示所有 HTML5 实体的浏览器
| 字符 | 实体 | 实体名称 | 十六进制 |
|---|---|---|---|
| Ú | Ú | Uacute | 000DA |
| ú | ú | uacute | 000FA |
| ↟ | ↟ | Uarr | 0219F |
| ⇑ | ⇑ | uArr | 021D1 |
| ↑ | ↑ | uarr | 02191 |
| ⥉ | ⥉ | Uarrocir | 02949 |
| Ў | Ў | Ubrcy | 0040E |
| ў | ў | ubrcy | 0045E |
| Ŭ | Ŭ | Ubreve | 0016C |
| ŭ | ŭ | ubreve | 0016D |
| Û | Û | Ucirc | 000DB |
| û | û | ucirc | 000FB |
| У | У | Ucy | 00423 |
| у | у | ucy | 00443 |
| ⇅ | ⇅ | udarr | 021C5 |
| Ű | Ű | Udblac | 00170 |
| ű | ű | udblac | 00171 |
| ⥮ | ⥮ | udhar | 0296E |
| ⥾ | ⥾ | ufisht | 0297E |
| 𝔘 | 𝔘 | Ufr | 1D518 |
| 𝔲 | 𝔲 | ufr | 1D532 |
| Ù | Ù | Ugrave | 000D9 |
| ù | ù | ugrave | 000F9 |
| ⥣ | ⥣ | uHar | 02963 |
| ↿ | ↿ | uharl | 021BF |
| ↾ | ↾ | uharr | 021BE |
| ▀ | ▀ | uhblk | 02580 |
| ⌜ | ⌜ | ulcorn | 0231C |
| ⌜ | ⌜ | ulcorner | 0231C |
| ⌏ | ⌏ | ulcrop | 0230F |
| ◸ | ◸ | ultri | 025F8 |
| Ū | Ū | Umacr | 0016A |
| ū | ū | umacr | 0016B |
| ¨ | ¨ | uml | 000A8 |
| _ | _ | UnderBar | 0005F |
| ⏟ | ⏟ | UnderBrace | 023DF |
| ⎵ | ⎵ | UnderBracket | 023B5 |
| ⏝ | ⏝ | UnderParenthesis | 023DD |
| ⋃ | ⋃ | Union | 022C3 |
| ⊎ | ⊎ | UnionPlus | 0228E |
| Ų | Ų | Uogon | 00172 |
| ų | ų | uogon | 00173 |
| 𝕌 | 𝕌 | Uopf | 1D54C |
| 𝕦 | 𝕦 | uopf | 1D566 |
| ↑ | ↑ | UpArrow | 02191 |
| ⇑ | ⇑ | Uparrow | 021D1 |
| ↑ | ↑ | uparrow | 02191 |
| ⤒ | ⤒ | UpArrowBar | 02912 |
| ⇅ | ⇅ | UpArrowDownArrow | 021C5 |
| ↕ | ↕ | UpDownArrow | 02195 |
| ⇕ | ⇕ | Updownarrow | 021D5 |
| ↕ | ↕ | updownarrow | 02195 |
| ⥮ | ⥮ | UpEquilibrium | 0296E |
| ↿ | ↿ | upharpoonleft | 021BF |
| ↾ | ↾ | upharpoonright | 021BE |
| ⊎ | ⊎ | uplus | 0228E |
| ↖ | ↖ | UpperLeftArrow | 02196 |
| ↗ | ↗ | UpperRightArrow | 02197 |
| ϒ | ϒ | Upsi | 003D2 |
| υ | υ | upsi | 003C5 |
| ϒ | ϒ | upsih | 003D2 |
| Υ | Υ | Upsilon | 003A5 |
| υ | υ | upsilon | 003C5 |
| ⊥ | ⊥ | UpTee | 022A5 |
| ↥ | ↥ | UpTeeArrow | 021A5 |
| ⇈ | ⇈ | upuparrows | 021C8 |
| ⌝ | ⌝ | urcorn | 0231D |
| ⌝ | ⌝ | urcorner | 0231D |
| ⌎ | ⌎ | urcrop | 0230E |
| Ů | Ů | Uring | 0016E |
| ů | ů | uring | 0016F |
| ◹ | ◹ | urtri | 025F9 |
| 𝒰 | 𝒰 | Uscr | 1D4B0 |
| 𝓊 | 𝓊 | uscr | 1D4CA |
| ⋰ | ⋰ | utdot | 022F0 |
| Ũ | Ũ | Utilde | 00168 |
| ũ | ũ | utilde | 00169 |
| ▵ | ▵ | utri | 025B5 |
| ▴ | ▴ | utrif | 025B4 |
| ⇈ | ⇈ | uuarr | 021C8 |
| Ü | Ü | Uuml | 000DC |
| ü | ü | uuml | 000FC |
| ⦧ | ⦧ | uwangle | 029A7 |