a word or expression used to describe or identify something 叙词 - (
computing 计算机 a piece of additional information that describes the purpose and format of other data 描述符： 一段描述其他数据的目的和格式的附加信息The Global Descriptor Table is a data structure used to define the characteristics of the various memory areas used during program execution. 全局描述符表是一种数据结构，用于定义程序执行期间使用的各种内存区域的特征。
Word Origin1930s: from Latin, literally ‘describer’, from descript- ‘written down’, from the verb describere ‘write down’ from de- ‘down’ + scribere ‘write’.