希腊文小写字母 Eta η

This is the seventh letter of the Greek alphabet. In the Ionic number system, it is 8. It originated from the Phoenician letter Het, and Latin and Cyrillic letters originated from it, such as Н, И, Й. In the Old Slavonic alphabet, this letter corresponded to the letter 「izhe」. In modern Greek, it is called Ita and is pronounced not quite as it was in antiquity.

Like many other Greek letters, this one has found wide use in scientific notation. It refers to the enthalpy, refractive index, efficiency, and much more.

符号 「希腊文小写字母 Eta」 包含在 「Greek and Coptic」 块的 「字母」 子块中，并在1993年作为Unicode版本1.1的一部分获得批准。