1
- the fifth letter of the Greek alphabet (E, ε), transliterated as 'e'希腊语字母表中的第五个字母（译写为e）。
1.1
- as modifier denoting the fifth in a series of items, categories, etc.（一系列项目、分类中的）第五。
1.2
Epsilon
followed by Latin genitive Astronomy the fifth star in a constellation【天文】ε星（星座中第五颗星）：Epsilon Carinae.
船底座ε。
- permittivity电容率。
词源
Greek, 'bare or simple E', from psilos 'bare'.