The term 'E OR G, E.G.' is an abbreviation for the phrase 'Example or Group, Example Given'. This phrase is used to provide an example of a particular group or concept, and is often used in academic writing. The crossword solutions for this term are 'LETTER' (6 letters), 'KEY' (3 letters), and 'NOTE' (4 letters). LETTER could refer to a written communication, such as a LETTER or email, while KEY could refer to a KEY concept or idea that is essential to understanding the example given. Finally, NOTE could refer to a NOTE or annotation that provides additional information about the example given.