hashmark

from WordNet (r) 3.0 (2006)

hashmark
    n 1: an insignia worn to indicate years of service [syn:
         {service stripe}, {hashmark}, {hash mark}]

from The Collaborative International Dictionary of English v.0.48

hashmark \hash"mark`\ n. (Mil.)
   an insignia worn on the uniform to indicate years of service.

   Syn: service stripe, hash mark.
        [WordNet 1.5]