#mark  a visible indication made on a surface; "some previous reader had covered the pages with dozens of marks"
  supertype:  indicant__indication  a signal that serves to indicate or suggest something; "an indication of foul play"; "indications of strain"; "symptoms are the prime indicants of disease"
  subtype:  footprint__footmark__step  a mark of a foot or shoe on a surface; a clue that someone was present; "the police made casts of the footprints in the soft earth outside the window"
  subtype:  stroke.mark  a mark made by a writing implement (as in cursive writing)
     subtype:  downstroke  a stroke normally made in a downward direction
     subtype:  upstroke  a stroke normally made in an upward direction
     subtype:  underscore__underline  a line drawn underneath (especially under written matter)
  subtype:  hoofprint__hoofmark  a visible impression on a surface made by the hoof of an animal
  subtype:  line_like_mark__line  a mark that is long relative to its width; "He drew a line on the chart"; "The substance produced characteristic lines on the spectroscope"
     subtype:  cross_hair__crosshair__cross_wire__crosswire  either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration; "he had the target in his cross hairs"
     subtype:  dotted_line  a line made up of dots or dashes; often used to indicate where you are supposed to sign a contract; "just sign on the dotted line"
     subtype:  ascender  (printing) the part of tall lowercase letters that extends above the other lowercase letters
     subtype:  bar_line__barline  a vertical line marking the boundary between musical bars
        subtype:  double_bar  notation marking the end of principal parts of a musical composition; two adjacent bar lines
     subtype:  descender  (printing) the part of lowercase letters that extends below the other lowercase letters
     subtype:  curlicue__squiggle  a short twisting line
     subtype:  spectrum_line  an isolated component of a spectrum formed by radiation at a uniform frequency
     subtype:  trend_line__trendline  a line on a graph indicating a statistical trend
     subtype:  contour_line__contourline__contour  a line drawn on a map connecting points of equal height
        subtype:  thalweg  a line following the lowest points of a valley
     subtype:  guideline.line  a light line that is used in lettering to help align the letters
     subtype:  hairline.line  a very thin line
     subtype:  shaft  a line that forms the length of an arrow pointer
     subtype:  serif__seriph  (printing) a short line at the end of the main strokes of a character
     subtype:  staff_line__staffline  any of the 5 horizontal marks comprising a staff
     subtype:  ledger_line__leger_line__legerline  a short line; a notation for extending the range above or below the staff

No statement uses or specializes mark; click here to add one.