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The Collaborative International Dictionary
Refringent

Refringent \Re*frin"gent\ (-jent), a. [L. refringens, p. pr. of refringere. See Refract.] Pertaining to, or possessing, refringency; refractive; refracting; as, a refringent prism of spar.
--Nichol.

Wiktionary
refringent

a. That refracts; refractive