nonreflective
adjective
non·re·flec·tive ˌnän-ri-ˈflek-tiv 
: not reflective
especially : not capable of reflecting light, images, or sound
nonreflective surfaces
a nonreflective paint
Example Sentences
Recent Examples on the Web The Pro desktop tower starts at $5,999 (this includes a keyboard and mouse), while the Pro XDR Display starts at $4,999 for a monitor with a glossy finish and jumps to $5,999 for a nonreflective finish. 
Jacob Krol, CNN Underscored, 10 Dec. 2019 The hat sits on a faceless mannequin head, ears slightly splayed, behind nonreflective glass. Anna Russell, The New Yorker, 13 Apr. 2017
Jacob Krol, CNN Underscored, 10 Dec. 2019 The hat sits on a faceless mannequin head, ears slightly splayed, behind nonreflective glass. Anna Russell, The New Yorker, 13 Apr. 2017 Word History
First Known Use
1848, in the meaning defined above