noun
mirror image; reflection in a mirror
General term for an image reflected in a mirror or any mirrored surface; also used figuratively for something that closely resembles another.
湖面に映った山の鏡像が美しい。
The mirror image of the mountain reflected on the lake surface is beautiful.
彼の行動は父親の鏡像のようだ。
His behavior is like a mirror image of his father's.
noun
mirror image (math); inverse (of a point)
In mathematics, refers to the mirror image of a point or figure across a line or plane; also used for the inverse of a point with respect to a circle or sphere.
点Pの直線lに関する鏡像を求めよ。
Find the mirror image of point P with respect to line l.