Invigilator

Someone who ensures the smooth running of exams. An invigilator is responsible for ensuring that the Awarding Body's regulations are complied with; that exams start and finish at the correct time; that exam papers are secure whilst in their care; that attendance and seating plans are recorded; and that no cheating takes place. The invigilator will ...
Found on http://en.wikipedia.org/wiki/Glossary_of_education_terms_(G

invigilator

[n] - (British) someone who watches examination candidates to prevent cheating
Found on http://www.webdictionary.co.uk/definition.php?query=invigilator
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