RFID Definition
 ärefīdē 
    abbreviation
  
 Radio frequency identification.
 American Heritage 
    noun
  
 A system consisting of a tag with an embedded electronic chip that emits a radio signal, and a scanning device for reading that signal: used for identification, tracking merchandise, assessing fees, etc.
 Webster's New World 
Other Word Forms of RFID
Noun
Singular:
 RFIDPlural:
 rfids