光学雷达 guāngxuéléidá lidar Origin Definitions Defs Strokes Stroke Words Sentences Sents 光学 光學 guāngxué noun optics the branch of physics that deals with the properties, behavior, and nature of light雷达 雷達 léidá noun radar radio detection and ranging equipment used to locate objects and determine their distance or speed; a loanword from English "radar"