the fifth letter of the Greek alphabet (E, ε), transliterated as ‘e’ 希腊字母表中第五个字母(译写为e) ■[as modifier]denoting the fifth in a series of items, categories, etc ε项,ε类(一系列项目、分类中的第五位) ■(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星。