: Unicode character recognition.

Unicode character information

Combining three dots above

Displayed on your computer as:
(if the character is not rendered properly, you may not have the appropriate fonts)

Unicode name: Combining three dots above
Alternative names: Codepoint (hexadecimal): 0x20DB
Codepoint (decimal): 8411
In unicode block: Combining Diacritical Marks for Symbols

Html entities:

⃛ or ⃛

Character input:

There is no universal input system for Unicode characters. But you can use the system specific input methods below.

WindowsHold down Alt and press + on the numeric keyboard. Type: 20DB and release Alt. A registry key needs to be enabled for this to work. See Unicode input (wikipedia) for more details.
Linux: Hold down Crtl and ⇧ Shift and type U20DB. Now press ↵ Enter and release Crtl and ⇧ Shift.

Other Infos:

General category: Mn (Nonspacing_Mark): A nonspacing combining mark (zero advance width).
Bidirectional class is: NSM (Nonspacing_Mark): Any nonspacing mark.
Canocial combining class is: 230 (Above): Distinct marks directly above.