From the Latin spissatus meaning ‘thickened’, a species of cirrus cloud which has sufficient thickness to appear grey even when the cloud is between the Sun and the observer. See also cloud classification.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。