Letters that make double refraction
a, o, b, d, e, f, l, n, c, r, t, i, u are letters that make 'double refraction'
Words within double refraction
fraction, act, DO, do, re, ti, refraction, ref, AC, double, on, action, CT, RA, Io, ion, Ra, Re, LE, Ac, Fr, Ti, refract are words within 'double refraction'