hash mark

 

Entry from US Dictionary

noun

  • 1a service stripe worn on the left sleeve of an enlisted person’s uniform to indicate three years of service in the army or four years in the navy.
  • a service stripe on any uniform.
  • 2 Football one of a series of marks made along parallel lines that delineate the middle of the field, used to spot the ball after a play ends outside these lines.
  • 3the symbol .