Lowercase characters are letters in minuscule: a, b, c, …
Lowercase characters are letters in minuscule: a, b, c, …
In ASCII, they are the characters in the range [a-z]. But other characters (for instance accented characters like é, è, ê, à, î, ï, ù) are also considered lowercase.
The counterpart of lowercase is uppercase.
See also: Letter case on Wikipedia