'Manipulator' definitions:

Definition of 'manipulator'

From: WordNet
noun
An agent that operates some apparatus or machine; "the operator of the switchboard" [syn: operator, manipulator]
noun
A person who handles things manually

Definition of 'Manipulator'

From: GCIDE
  • Manipulator \Ma*nip"u*la`tor\, n. One who manipulates, sometimes in an underhanded or fraudulent manner; as, a stock market manipulator. [1913 Webster +PJC]