埃标记 Å

The angstrom unit is traditionally denoted by the capital letter 「A」 with a small circle above. It's called 「Angstrom Sign Å」. There are two symbols with similar writing in Unicode: the one you see on this page Å , and the Latin capital letter A with a circle Å from the 拉丁字母补充1  0080–00FF block.

Angstrom is a unit of length that is used worldwide. However, it doesn't form a part of the International System of Units (SI). One angstrom is equal to 1 µm (one millionth of a meter). This is approximately the diameter of an electron's orbit, the distance between bonds in a crystalline lattice. As for the SI system, the nearest unit to the angstrom is the nanometer ㎚ .

符号 「埃标记」 包含在 「字母式符号」 块的 「字母符號」 子块中，并在1993年作为Unicode版本1.1的一部分获得批准。