Notch
Of indentation.
A V-shaped or U-shaped indentation carved or scratched into a surface; "there were four notches in the handle of his revolver".
This concept's ID is @1~20870
Contains
- serration
A single notch in a row of notches; "one of the serrations was broken off".
- undercut
A notch cut in the trunk of tree in order to determine the direction of its fall.
- thumb index
One of a series of rounded notches in the fore edge of a book to indicate sections.