- 放大器 fàngdàqì amplifieran electronic device, consisting of components like transistors or vacuum tubes, used to increase the power or voltage of a signal; also called [[扩大器|擴大器|kuo4 da4 qi4]] or [[强波器|強波器|qiang2 bo1 qi4]]
- 放大镜 fàngdàjìng magnifying glassmagnifying glass; magnifier
- 放大炮 fàngdàpào to boastTo talk big or brag; to shoot off one's mouth
- 放大率 fàngdàlǜ magnifying powerThe magnification capability of optical instruments like microscopes or telescopes; also called [[倍率|倍率|bei4 lu:4]]
- 放大纸 fàngdàzhǐ enlarging paperLight-sensitive paper used for making photographic enlargements; bromide paper
- 放大片 fàngdàpiàn circle contact lens(Taiwan) cosmetic contact lenses designed to make the iris appear larger
- 模拟放大器 mónǐfàngdàqì analog amplifier
- 仪表放大器 yíbiǎofàngdàqì instrumentation amplifierAn electronic device used to amplify very weak signals while maintaining high accuracy, commonly used in measurement and test equipment
- 系列放大器 xìlièfàngdàqì series amplifier
- 功率放大器 gōnglǜfàngdàqì power amplifierelectronic device that increases the power of a signal to drive a load such as a loudspeaker
- 放大倍数 fàngdàbèishù magnificationmagnifying power; degree of magnification
- 放大定 fàngdàdìng to send grand betrothal giftsthe second and more formal stage of presenting betrothal gifts in traditional Chinese marriage customs
- 放大尺 fàngdàchǐ pantographdrawing instrument consisting of a framework of jointed rods used for copying a plan or drawing on a different scale
- 放大机 fàngdàjī enlargerA photographic enlarger used to produce prints from film negatives.