1) Content 2) Message 3) Parenthetical 4) Qualifying or explaining 5) Subject matter 6) Substance 1) Incidental 2) Parenthetical 
• (a.) Alt. of Parenthetical
[adj] - as if using parentheses 2. [adj] - qualifying or explaining
parenthetic, parenthetical Additional words which are often casual, irrelevant, and superfluous; but they may also be significant bits of information that come to the speaker spontaneously and are deemed important enough to be mentioned. Commas, dashes, and brackets may also be used to set off such material when writing.
parenthetical adjective qualifying or explaining; placed or as if placed in parentheses; `parenthetical remarks`