Entry 1 sense Webster, 1913 Crystallographer /(krĭs"tal*lŏg"rȧ*fẽr)/ · Crys·tal·log·ra·pher · IPA /krˌɪstəlˈɑɡrəfər/ 01 n. One who describes crystals, or the manner of their formation; one versed in crystallography. 1. One who describes crystals, or the manner of their formation; one versed in crystallography.