de·scrip·tor /dɪˈskrɪptɚ/
  描述符,解說符,主字碼
  descriptor
  描述者; 記述子
  descriptor
  描述符
  descriptor
       n 1: the phonological or orthographic sound or appearance of a
            word that can be used to describe or identify something;
            "the inflected forms of a word can be represented by a
            stem and a list of inflections to be attached" [syn: form,
             word form, signifier]
       2: a piece of stored information that is used to identify an
          item in an information storage and retrieval system