a mural done with watercolors on wet plastera durable method of painting on a wall by using watercolors on wet plasterv.paint onto wet plaster on a wall
英汉双解大词典
fresco/ˈfrɛskəʊ/star1TEM8(frescos)
1.
N-COUNT（可数名词）
A fresco is a picture that is painted on a plastered wall when the plaster is still wet. 湿壁画 → see also alfresco