An Aristotelian pattern of definition that proceeds by citing a genus to which a term belongs, and then the difference that gives its species and so locates it within the genus. The classic example is the definition of humans as rational animals.
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。