The Greek Capital Letter Alpha with Tonos symbol (Ξ). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Greek Letters.
The quickest way is to copy Ξ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
Ξ is U+0386 (decimal 902).
Use Ά in HTML to render Ξ on a web page.
On Windows you can type it with Alt+902 (hold Alt and enter the number on the numeric keypad).
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