| guāng | light/ray/bright/only/merely/to use up/CL:道[dao4] |
| 光 | light ray CL:道 |
| 光中子 | photoneutron |
| 光临 | (honorific) Welcome! You honor us with your presence. It is an honor to have you. |
| 光二极管 | photodiode light-emitting diode (LED) |
| 光亮 | bright |
| 光亮带 | euphotic zone |
| 光亮度 | brightness luminosity |
| 光亮的 | luculent; lucent; luminant; splendid; sheeny; shining; agleam; beamy; luciferous; laete; splendent; bright; lucency; beaming; sheeney |
| 光介子 | photomeson |
| 光伏 | photovoltaic (e.g. cell) |
| 光伏器件 | photovoltaic device (e.g. solar cell) |
| 光信号 | optical signal |
| 光光 | bright shiny smooth |
| 光具座 | optical bench; bench |
| 光冲量 | radiant exposure |
| 光凝固器 | photocoagulator |
| 光分解 | photolysis; photodecomposition; photochemical decomposition |
| 光制 | finish; finishing; high finish |
| 光刻 | photolithography |
| 光刻胶 | photoresist (laser etching used in microelectronics) |