词根词缀：crystallo-, crystall-

【来源及含义】Greek: crystal, ice, freeze, congeal, frost; icelike, transparent; [especially in reference to a mineral or glass]

【相关词根词缀】Additional related "ice" units: glaci-; grando-.

【同源单词】cryptocrystalline, crystal, crystalline, crystallogram, crystallographer, crystallography

词根词缀：photo-, phot-, -photic

【来源及含义】Greek: light; ultraviolet and infrared radiation; radiant energy

【相关词根词缀】 Etymologically related "light, shine, glow" word families: ethero-; fulg-; luco-; lumen-, lum-; luna, luni-; lustr-; phengo-; pheno-; phospho-; scinti-, scintill-; splendo-.

【同源单词】aphotesthesia, aphotic, aphototaxis, aphototropism, astrophotograph, astrophotographer