art nouveau noun
or Art Nouveau /ˌɑɚtnuˈvoʊ/ or Art Nouveau /ˌɑɚtnuˈvoʊ/ Learner's definition of ART NOUVEAU
[noncount]
: a style of art, design, and architecture that uses curving lines and shapes that look like leaves and flowers新艺术 ◊ Art Nouveau was popular in the U.S. and Europe in the late 1800s.新艺术在19世纪末风靡欧美。