Alphabetic Character (Noun)

The conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters".

Nouns denoting communicative processes and contents.

The programming language required each variable name to start with an alphabetic character.
She slowly spelled out her last name, proudly sounding out each alphabetic character.
In the data validation rule, only alphabetic characters and spaces were allowed in the input field.
According to the company's style guide, headings should only contain uppercase alphabetic characters.
The security protocol only accepted passwords that contained a mix of numeric and alphabetic characters.