noun (n)

• someone who scans verse to determine the number and prosodic value of the syllables(noun.person)

  source: wordnet30
• an electronic device that generates a digital representation of an image for data input to a computer(noun.artifact)

  Synonym:
  digital scanner, image scanner
  

  source: wordnet30
• a radar dish that rotates or oscillates in order to scan a broad area(noun.artifact)

  source: wordnet30
• a radio receiver that moves automatically across some selected range of frequencies looking for some signal or condition(noun.artifact)

  Example:
  They used scanners to monitor police radio channels.
  

  Synonym:
  electronic scanner
  

  source: wordnet30