lowercase English letters
Computing term; specifically refers to lowercase letters of the English alphabet. Often contrasted with 英大文字 (uppercase English letters).
See also: 英大文字
Please include lowercase English letters and numbers in the password.
英大文字 means uppercase English letters, while 英小文字 means lowercase English letters.
Compound of 英 (English), 小 (small), and 文字 (letter/character).