词根：-gram-, -graph-

【词根含义】：写,画

【词根来源】：-gram-来源于希腊语名词gramma(写下的东西),其在希腊语中派生了形容词grammatikos(字母的),名词化为grammatike,进入拉丁语为grammatica,古法语为gramaire,盎格鲁-诺曼底语为gramere。-graph-来源于希腊语graphein(写,画)。

【同源单词】：cryptogram, diagram, electrocardiogram, epigram, gram

词根：-meter-, -metr-

【词根含义】：测量;仪表

【词根来源】：来源于希腊语metron测量。可追溯至原始印欧语met-, med-。

【同源单词】：accelerometer, acetimeter, acetometer, altimeter, audiometer

词根：-phot-, -photo-

【词根含义】：光

【词根来源】：来源于希腊语phot, phos(光)。

【同源单词】：photon, photochemistry, photocopier, photocopy, photoelectric

词根词缀：meter-, metro-, metr-, -metrical, -metrically, -metron, -metric, -metrist, -meter, -meters, -metry, -metre

【来源及含义】Greek: measure

【相关词根词缀】 Related "measure" and "metric" words and charts: mens-; Metric Chart of Units; Metric-Length Converter; Metric Units and Links.

【同源单词】absorptiometry, accelerometer, acetimeter, acetimetry, acidimeter, acidimetry

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