refringent
Concise Oxford English Dictionary © 2008 Oxford University Press:
refringent /rɪˈfrɪn(d)ʒ(ə)nt/
▶adjective Physics refractive.
– derivatives
refringence noun.
refringence noun.
– origin C18: from L. refringent-, refringere, lit. ‘break again’.
'refringent' also found in these Oxford entries:

