ˈkɹɪst.əl.aɪn ˈlɪmpɪd ˈl(j)uːsɪd pəˈluːsɪd tɹæn(t)sˈpæɹənt consisting of or containing or of the nature of crystals granite is crystalline transmitting light; able to be seen through with clarity the cold crystalline water of melted snow crystal clear skies could see the sand on the bottom of the limpid pool lucid air a pellucid brook transparent crystal distinctly or sharply outlined crystalline sharpness of outline