dah

noun2

1. •
   The spoken representation of a dash in radio and telegraph Morse code.
2. •
   A long knife or sword with a round cross-section grip, a long, gently curving blade with a single edge, and no guard.

   • It was like a sea of people, two thousand at the least, black and white in the moon, with here and there a curved dah glittering. — 1934