The crossword solution for the term PARENTHESIS, E.G. is ARC, which is an abbreviation of the word 'arcs'. Arcs are curved lines that are used to enclose or emphasize a part of a text, such as parentheses. Parentheses are a type of punctuation mark that is used to set off information from the main text. They are often used to provide additional information or to clarify a point. Parentheses can also be used to indicate a pause in speech or to separate two related ideas.