obelisms

/ˈɑbəˌlɪzəmz/
noun
  1. The use of obelus symbols († or ÷) in writing, especially to mark passages as spurious, doubtful, or for critical annotation.
    • The editor's obelisms made it clear which verses were omitted from the earliest copies.
    • The scholar's obelisms in the manuscript helped readers identify which lines were likely added later.
    • In the textbook, obelisms were used to indicate sections that historians consider unreliable.