the characters that were once kept in bottom half of a compositor's type case
Adjective:
relating to small (not capitalized) letters that were kept in the lower half of a compositor's type case;
"lowercase letters; a and b and c etc"
例句
用作名词 (n.)
Using all lowercase letters looks lazy. 都用小写字母回让人觉得你很懒散。
A typical use of a bracket expression is to specify matches of any upper- or lowercase alphabetic characters or any digits. 中括号表达式的典型用途是指定任何大写或小写字母或任何数字的匹配。