Letters that make refractive index
a, d, e, f, n, c, r, t, i, v, x are letters that make 'refractive index'
Words within refractive index
index, act, re, ti, ref, AC, active, ex, iv, refractive, in, CT, IV, RA, DE, IN, ND, Ra, Re, Ac, Fr, In, Nd, Ti, refract are words within 'refractive index'