op artyoudaoicibaDictYouDict[op art 词源字典]
"A form of abstract art that gives the illusion of movement by the precise use of pattern and colour, or in which conflicting patterns emerge and overlap. Bridget Riley and Victor Vasarely are its most famous exponents", 1960s: shortened from optical art, on the pattern of pop art.[op art etymology, op art origin, 英语词源]