[mass noun]a brilliant deep blue pigment originally obtained from lapis lazuli 群青,海蓝 ■an imitation of such a pigment, made from powdered fired clay, sodium carbonate, sulphur, and resin 人造群青 ■a brilliant deep blue colour 群青色
语源
late 16th cent.: from medieval Latin ultramarinus 'beyond the sea'; the name of the pigment is from obsolete Italian (azzurro) oltramarino, literally ('azure) from overseas'