definition of
descriptor

[1] #1 descriptor n. [form, word form, signifier] 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". wn

[2] #2 descriptor n. a piece of stored information that is used to identify an item in an information storage and retrieval system. wn