cirrocumulus
/ˌsɪrəʊˈkjuːmjʊləs/noun
mass noun
- cloud forming a broken layer of small fleecy clouds at high altitude (usually 5 to 13 km, 16,500 to 45,000 ft), typically with a rippled or granulated appearance (as in a mackerel sky)卷积云（高海拔［常为5至13公里, 即16,500至45,000英尺］处的云形成小块蓬松云断层, 表面多为波纹或粗糙呈颗粒状［如鱼鳞天］）。