平面镜 píngmiànjìng plane mirror Definitions Defs Origin Strokes Stroke Words Sentences Sents 平面 píngmiàn noun plane (geometry) a flat surface; in mathematics, a surface containing all the straight lines that connect any two points on it镜 鏡 jìng noun mirror (bound form) mirror; an object used to reflect an image, often made of glass with a metallic backing
