| Trad. | Simp. | Pinyin | English |
| 愛克斯光 | 爱克斯光 | ài kè sī guāng | X-ray; Roentgen ray |
| 暗線光譜 | 暗线光谱 | àn xiàn guāng pǔ | dark-line spectrum |
| 暴光 | bào guāng | exposure | |
| 背光 | bèi guāng | be in a poor light; do something with one's back to the light; stand in one's own light | |
| 不光 | bù guāng | not the only one; not only | |
| 採光 | 采光 | cǎi guāng | lighting; day lighting |
| 大谷光瑞 | Dà gǔ guāng ruì | Ōtani Kōzui | |
| 單模光纖 | 单模光纤 | dān mó guāng xiān | single mode fiber |
| 淡光 | dàn guāng | shimmer | |
| 道光帝 | Dào guāng dì | Daoguang Emperor | |
| 德川光貞 | 德川光贞 | Dé chuān guāng zhēn | Tokugawa Mitsusada |
| 燈光 | 灯光 | dēng guāng | (stage) lighting; light |
| 東光 | 东光 | Dōng guāng | (N) Dongguang (place in Hebei) |
| 多模光纖 | 多模光纤 | duō mó guāng xiān | multimode fiber |
| 發光 | 发光 | fā guāng | shine |
| 發光二極管 | 发光二极管 | fā guāng èr jí guǎn | light-emitting diode; LED |
| 發揚光大 | 发扬光大 | fā yáng guāng dà | (saying) to develop, advocate, and promulgate |
| 放射性發光材料 | 放射性发光材料 | fàng shè xìng fā guāng cái liào | radiophosphor |
| 非線性光學 | 非线性光学 | fēi xiàn xìng guāng xué | nonlinear optics (math. phys.) |
| 風光 | 风光 | fēng guāng | (n) natural scenic view |
| 觀光 | 观光 | guān guāng | (v) tour; go sightseeing |
| 觀光客 | 观光客 | guān guāng kè | tourist |
| 光 | guāng | light; ray; bright | |
| 光斑 | guāng bān | facula | |
| 光筆 | 光笔 | guāng bǐ | light pen |
| 光標 | 光标 | guāng biāo | cursor (computer) |
| 光波 | guāng bō | (n) light wave | |
| 光波長 | 光波长 | guāng bō cháng | optical wavelength |
| 光彩 | guāng cǎi | honorable; reputable | |
| 光衝量 | 光冲量 | guāng chōng liáng | radiant exposure |
| 光磁 | guāng cí | magneto-optical | |
| 光磁碟 | guāng cí dié | magneto-optical disk; floptical disk | |
| 光磁碟機 | 光磁碟机 | guāng cí dié jī | magneto-optical drive; floptical drive |
| 光導纖維 | 光导纤维 | guāng dǎo xiān wéi | optical fiber |
| 光電 | 光电 | guāng diàn | opto-electrical |
| 光電效應 | 光电效应 | guāng diàn xiào yìng | photoelectric effect |
| 光電子 | 光电子 | guāng diàn zǐ | photoelectronic |
| 光碟 | guāng dié | CD; compact disk | |
| 光碟燒錄技術 | 光碟烧录技术 | guāng dié shāo lù Jì shù | optical disc authoring |
| 光度 | guāng dù | luminosity | |
| 光二極管 | 光二极管 | guāng èr jí guǎn | light emitting diode; LED |
| 光發送器 | 光发送器 | guāng fā sòng qì | optical transmitter |
| 光放大器 | guāng fàng dà qì | optical amplifier | |
| 光輻射 | 光辐射 | guāng fú shè | light radiation |
| 光復鄉 | 光复乡 | Guāng fù xiāng | (N) Kuangfu (village in Taiwan) |
| 光岡汽車 | 光冈汽车 | Guāng gāng Qì chē | Mitsuoka |
| 光功率 | guāng gōng lǜ | optical power | |
| 光棍兒 | 光棍儿 | guāng gùn er | (n) bachelor |
| 光合 | guāng hé | photosynthesis | |
| 光合作用 | guāng hé zuò yòng | photosynthesis | |
| 光化學 | 光化学 | guāng huà xué | photochemistry |
| 光滑 | guāng hua | glossy; sleek; smooth | |
| 光環 | 光环 | guāng huán | halo; ring of light |
| 光輝 | 光辉 | guāng huī | radiance |
| 光檢測器 | 光检测器 | guāng jiǎn cè qì | optical detector |
| 光接收器 | guāng jiē shōu qì | optical receiver | |
| 光刻 | guāng kè | photolithography | |
| 光纜 | 光缆 | guāng lǎn | optical cable |
| 光亮 | guāng liàng | bright | |
| 光臨 | 光临 | guāng lín | (court.) be present; to attend |
| 光芒 | guāng máng | rays of light; brilliant rays; radiance | |
| 光明 | guāng míng | bright (future); promising | |
| 光明日報 | 光明日报 | guāng míng rì bào | Guangming Daily |
| 光年 | guāng nián | light-year | |
| 光槃 | 光盘 | guāng pán | compact disc |
| 光譜 | 光谱 | guāng pǔ | spectrum |
| 光譜儀 | 光谱仪 | guāng pǔ yí | spectrometer; spectrograph |
| 光漆 | guāng qī | enamel | |
| 光氣 | 光气 | guāng qì | phosgene |
| 光圈 | guāng quān | aperture; diaphragm | |
| 光榮 | 光荣 | guāng róng | honor and glory |
| 光榮革命 | 光荣革命 | guāng róng gé mìng | Revolution of 1688 |
| 光山 | Guāng shān | (N) Guangshan (place in Henan) | |
| 光射線 | 光射线 | guāng shè xiàn | light ray |
| 光是 | guāng shì | solely; just | |
| 光束 | guāng shù | beam | |
| 光速 | guāng sù | speed of light | |
| 光速可變理論 | 光速可变理论 | guāng sù kě biàn lǐ lùn | variable speed of light |
| 光天化日 | guāng tiān huà rì | in broad daylight | |
| 光禿禿 | 光秃秃 | guāng tū tū | bald |
| 光纖 | 光纤 | guāng xiān | light; ray; optical; optical fiber; fiber optic |
| 光纖電纜 | 光纤电缆 | guāng xiān diàn lǎn | optical fiber; optical cable |
| 光纖分佈式數據介面 | 光纤分布式数据介面 | guāng xiān fēn bù shì shù jù jiè miàn | Fiber Distributed Data Interface; FDDI |
| 光纖分佈數據接口 | 光纤分布数据接口 | guāng xiān fēn bù shù jù jiē kǒu | FDDI; Fiber Distributed Data Interface |
| 光纖分散式資料介面 | 光纤分散式资料介面 | guāng xiān fēn sàn shì zī liào jiè miàn | fiber distributed data interface; FDDI |
| 光纖接口 | 光纤接口 | guāng xiān jiē kǒu | optical interface |
| 光纖衰減 | 光纤衰减 | guāng xiān shuāi jiǎn | optical attenuation |
| 光線 | 光线 | guāng xiàn | optical line; optical cable; light ray |
| 光信號 | 光信号 | guāng xìn hào | optical signal |
| 光緒帝 | 光绪帝 | Guāng xù dì | Guangxu Emperor |
| 光學 | 光学 | guāng xué | optics (math. phys.); optical (instrument) |
| 光學顯微鏡 | 光学显微镜 | guāng xué xiǎn wēi jìng | optical microscope |
| 光陰似箭 | 光阴似箭 | guāng yīn sì jiàn | time flies (idiom) |
| 光源 | guāng yuán | light source | |
| 光澤 | 光泽 | guāng zé | luster |
| 光之精靈 | 光之精灵 | Guāng zhī jīng líng | Calaquendi |
| 光州 | guāng zhōu | Kwangju (South Korea) | |
| 光子 | guāng zǐ | (phys.) photon (particle or quantum of light) | |
| 光宗信吉 | Guāng zōng xìn jí | Shinkichi Mitsumune | |
| 光宗耀祖 | guāng zōng yào zǔ | to bring honor to one's ancesors | |
| 化學激光器 | 化学激光器 | huà xué jī guāng qì | chemical laser |
| 歡迎光臨 | 欢迎光临 | huān yíng guāng lín | welcome |
| 火光 | huǒ guāng | (n) firelight | |
| 激光 | jī guāng | laser | |
| 激光唱片 | jī guāng chàng piàn | compact disk; CD | |
| 激光打引機 | 激光打引机 | jī guāng dǎ yǐn jī | laser printer |
| 激光二極管 | 激光二极管 | jī guāng èr jí guǎn | laser diode |
| 激光器 | jī guāng qì | laser | |
| 極光 | 极光 | jí guāng | aurora (astronomy) |
| 金光閃爍 | 金光闪烁 | jīn guāng shǎn shuò | spangle |
| 九龍真光中學 | 九龙真光中学 | Jiǔ lóng Zhēn guāng Zhōng xué | Kowloon True Light Middle School |
| 莒光鄉 | 莒光乡 | Jǔ guāng xiāng | (N) Chukuang (village in Taiwan) |
| 可見光 | 可见光 | kě jiàn guāng | optical spectrum |
| 理光 | Lǐ guāng | Ricoh | |
| 李光耀 | Lǐ Guāng yào | Lee Kuan Yew (former Prime Minister of Singapore) | |
| 亮光 | liàng guāng | (n) light | |
| 磷光 | lín guāng | phosphorescence | |
| 美國國家光學天文臺 | 美国国家光学天文台 | Měi guó Guó jiā Guāng xué Tiān wén tái | National Optical Astronomy Observatory |
| 磨光 | mò guāng | (v) polish | |
| 目光 | mù guāng | sight; vision; view | |
| 目光短淺 | 目光短浅 | mù guāng duǎn qiǎn | shortsighted |
| 逆光 | nì guāng | backlighting (lighting design) | |
| 曝光 | pù guāng | exposure | |
| 戚繼光 | 戚继光 | Qī Jì guāng | Qi Jiguang |
| 強光 | 强光 | qiáng guāng | glare |
| 青光眼 | qīng guāng yǎn | glaucoma | |
| 屈光度 | qū guāng dù | dioptre | |
| 日光 | rì guāng | (n) sunlight | |
| 日光燈 | 日光灯 | rì guāng dēng | fluorescent light |
| 日光浴 | rì guāng yù | (n) sunbath | |
| 散光 | sǎn guāng | astigmatism | |
| 閃光 | 闪光 | shǎn guāng | flash |
| 施光南 | Shī Guāng nán | Shi Guangnan | |
| 時光 | 时光 | shí guāng | (n) time; era; period of time |
| 壽光 | 寿光 | Shòu guāng | (N) Shouguang (city in Shandong) |
| 曙光 | shǔ guāng | dawn; the dawn of a new epoch (metaphor) | |
| 雙光氣 | 双光气 | shuāng guāng qì | diphosgene |
| 蘇澤光 | 苏泽光 | Sū Zé guāng | Jack So |
| 太陽光 | 太阳光 | tài yáng guāng | sunlight |
| 透光 | tòu guāng | transparent; translucent | |
| 微光 | wēi guāng | glimmer | |
| 星光 | xīng guāng | (n) starlight | |
| 眼光 | yǎn guāng | vision | |
| 楊光 | 杨光 | Yáng Guāng | Yeung Kwong |
| 陽光 | 阳光 | yáng guāng | sunshine |
| 仰光 | yǎng guāng | Rangoon (capital of Burma) | |
| 一線微光 | 一线微光 | yī xiàn wéi guāng | gleam |
| 音樂光碟 | 音乐光碟 | yīn yuè guāng dié | music CD |
| 熒光 | 荧光 | yíng guāng | fluorescence |
| 油光漆 | yóu guāng qī | varnish | |
| 遠紫外分光探測器 | 远紫外分光探测器 | Yuǎn zǐ wài fēn guāng tàn cè qì | Far Ultraviolet Spectroscopic Explorer |
| 月光 | yuè guāng | moonlight | |
| 沾光 | zhān guāng | (v) bask in the light of sb or sth; take advantage of reflected glory | |
| 張華光 | 张华光 | Zhāng Huá guāng | Zhang Huaguang (person name) |
| 趙光祖 | 赵光祖 | Zhào guāng zǔ | Cho Kwangjo |
| 燭光 | 烛光 | zhú guāng | (n) candle-light; candlepower |
| 燭光集會 | 烛光集会 | zhú guāng jí huì | candlelight vigil |
| 紫外光 | zǐ wài guāng | ultraviolet light |
Click on the pinyin to hear it pronounced. The simplified version is shown only if different from the traditional.
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