[n] an instrument (usually driven by a computer) for drawing graphs or pictures [n] a member of a conspiracy [n] a clerk who marks data on a chart [n] a planner who draws up a personal scheme of action
coconspirator, conspirator, machinator, mapper, schemer
archtraitor, Benedict Arnold, betrayer, Brutus, cockatrice, coconspirator, conniver, conspirator, conspirer, counterplotter, double agent, double-crosser, double-dealer, exploiter, finagler, informer, intrigant, intriguer, Judas, Judas Iscariot, Machiavel