parenthesis
1. [ noun ] either of two punctuation marks ( or ) used to enclose textual material
Related terms: punctuation
2. [ noun ] a message that departs from the main subject
Synonyms: excursus aside divagation digression
Related terms: message digress
Similar spelling:   parentless
  parenthetic
  parentage
  parenthetical
  parenthood
  parented
  parental
  Parenteau