"descriptor" in the noun sense
1. form, word form, signifier, descriptor
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"
2. descriptor
a piece of stored information that is used to identify an item in an information storage and retrieval system
Source: WordNet® (An amazing lexical database of English)
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