回かい転てん面めんかいてんめんMeanings1nounsurface of revolutionMathematical term for a surface created by rotating a curve around an axis.球きゅう面めんは円えんを回かい転てんさせてできる回かい転てん面めんの一いっ種しゅです。A sphere is a type of surface of revolution formed by rotating a circle.
