thaumatropeyoudaoicibaDictYouDict[thaumatrope 词源字典]
"A scientific toy devised in the 19th century, consisting of a disc with a different picture on each of its two sides, these appearing to combine into one image when the disc is rapidly rotated", Early 19th century: from Greek thauma 'marvel' + -tropos '-turning'.[thaumatrope etymology, thaumatrope origin, 英语词源]