thaumatrope
/ˈθɔːmətrəʊp/noun
1- a scientific toy that was devised in the 19th century, consisting of a disc having a different picture on each of its two sides, these appearing to combine into one image when the disc is rapidly rotated幻影转盘（19世纪设计的一种科学玩具, 在圆盘的两边各绘有一张不同的图片, 当圆盘快速旋转时, 会形成两边图片合并成一个图像的幻觉）。
词源
early 19th cent.: from Greek thauma 'marvel' + -tropos '-turning'.