Ο capital omicron
Ο
U+039F
Copy as
| Character | Ο | |
|---|---|---|
| Unicode | U+039F | |
| HTML decimal | Ο | |
| HTML hexadecimal | Ο | |
| HTML named entity | Ο | |
| CSS content | \039F | |
| JavaScript / UTF-16 | \u039F | |
| UTF-8 bytes | CE 9F |
Meaning & usage
Capital omicron (Ο) is a Greek letter used in writing and scientific notation.
Greek letters often label angles, constants or variables; uppercase and lowercase forms can represent different quantities.
This is the capital omicron form, encoded as U+039F. Its uppercase identity matters in formulas: changing case can change the variable or quantity being represented.
capital omicron occupies one Unicode code point. A similar-looking letter, punctuation mark or emoji is not necessarily interchangeable with Ο in search, filenames or text processing.
How to type capital omicron
- Windows
- Use Win + . for the emoji and symbol panel, or Character Map for supported fonts. In Microsoft Word, enter each hexadecimal code (39F) and press Alt + X. There is no universal decimal Alt code for this character; legacy Alt codes depend on the code page.
- Mac
- Open Character Viewer with Control + Command + Space and search for capital omicron. With the Unicode Hex Input keyboard enabled, hold Option and enter the UTF-16 units shown above. Standard Option shortcuts do not cover every Unicode symbol.
- Linux
- In compatible GTK applications, press Ctrl + Shift + U, enter 39F, then Enter. Enter each code point separately for sequences. Other desktops or apps may require their character picker.
- iPhone & Android
- Look for capital omicron in your emoji keyboard if available, or copy it here and paste. Save frequently used symbols as a text replacement or keyboard shortcut; availability varies by keyboard.