armband

from WordNet (r) 3.0 (2006)

armband
    n 1: worn around arm as identification or to indicate mourning
    2: a band worn around the upper arm

from The Collaborative International Dictionary of English v.0.48

armband \armband\ n.
   1. a band worn around arm as identification or to indicate
      mourning.
      [WordNet 1.5]

   2. a band worn around the upper arm.
      [WordNet 1.5]