词根词缀：cata-, cat-, cath-, kata-

【来源及含义】Greek: down, downward; under, lower; against; entirely, in accordance with, completely; definitely

【同源单词】acatalepsia, acatalepsy, acataleptic, acatamathesia, acataphasia, acataposia

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