The Collaborative International Dictionary of English v.0.48:

nonreflecting \nonreflecting\ nonreflective \nonreflective\adj.
   1. not capable of total reflection of light; not polished or
      shiny; as, It is complicated to create realistic shading
      effects on nonreflecting surfaces. [Narrower terms:
      echoless ] {reflective
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

nonreflecting
    adj 1: not capable of physical reflection [syn: nonreflective,
           nonreflecting] [ant: reflective]